KILLED
proof of input_7Y69lCmb6U.trs
# AProVE Commit ID: aff8ecad908e01718a4c36e68d2e55d5e0f16e15 fuhs 20220216 unpublished


The Runtime Complexity (parallel-innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF).

(0) CpxTRS
(1) RenamingProof [BOTH BOUNDS(ID, ID), 0 ms]
(2) CpxTRS
(3) CpxTrsToCdtProof [UPPER BOUND(ID), 0 ms]
(4) CdtProblem
    (5) CdtToCpxRelTrsProof [BOTH BOUNDS(ID, ID), 0 ms]
    (6) CpxRelTRS
    (7) RenamingProof [BOTH BOUNDS(ID, ID), 0 ms]
    (8) CpxRelTRS
    (9) TypeInferenceProof [BOTH BOUNDS(ID, ID), 0 ms]
    (10) typed CpxTrs
    (11) OrderProof [LOWER BOUND(ID), 12 ms]
    (12) typed CpxTrs
    (13) RewriteLemmaProof [LOWER BOUND(ID), 511 ms]
    (14) typed CpxTrs
    (15) RewriteLemmaProof [LOWER BOUND(ID), 233 ms]
    (16) BEST
        (17) proven lower bound
            (18) LowerBoundPropagationProof [FINISHED, 0 ms]
            (19) BOUNDS(n^1, INF)
        (20) typed CpxTrs
(21) RelTrsToTrsProof [UPPER BOUND(ID), 0 ms]
(22) CpxTRS
(23) RelTrsToWeightedTrsProof [UPPER BOUND(ID), 0 ms]
(24) CpxWeightedTrs
    (25) TypeInferenceProof [BOTH BOUNDS(ID, ID), 0 ms]
    (26) CpxTypedWeightedTrs
    (27) CompletionProof [UPPER BOUND(ID), 0 ms]
    (28) CpxTypedWeightedCompleteTrs
        (29) NarrowingProof [BOTH BOUNDS(ID, ID), 0 ms]
        (30) CpxTypedWeightedCompleteTrs
        (31) CpxTypedWeightedTrsToRntsProof [UPPER BOUND(ID), 0 ms]
        (32) CpxRNTS
        (33) SimplificationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (34) CpxRNTS
    (35) CompletionProof [UPPER BOUND(ID), 0 ms]
    (36) CpxTypedWeightedCompleteTrs
        (37) CpxTypedWeightedTrsToRntsProof [UPPER BOUND(ID), 0 ms]
        (38) CpxRNTS
(39) CpxTrsToCdtProof [UPPER BOUND(ID), 0 ms]
(40) CdtProblem
    (41) CdtLeafRemovalProof [BOTH BOUNDS(ID, ID), 0 ms]
    (42) CdtProblem
    (43) CdtToCpxRelTrsProof [BOTH BOUNDS(ID, ID), 0 ms]
    (44) CpxRelTRS
        (45) RelTrsToTrsProof [UPPER BOUND(ID), 0 ms]
        (46) CpxTRS
        (47) RelTrsToWeightedTrsProof [BOTH BOUNDS(ID, ID), 0 ms]
        (48) CpxWeightedTrs
            (49) TypeInferenceProof [BOTH BOUNDS(ID, ID), 0 ms]
            (50) CpxTypedWeightedTrs
            (51) CompletionProof [UPPER BOUND(ID), 0 ms]
            (52) CpxTypedWeightedCompleteTrs
                (53) CpxTypedWeightedTrsToRntsProof [UPPER BOUND(ID), 0 ms]
                (54) CpxRNTS
            (55) CompletionProof [UPPER BOUND(ID), 0 ms]
            (56) CpxTypedWeightedCompleteTrs
                (57) NarrowingProof [BOTH BOUNDS(ID, ID), 0 ms]
                (58) CpxTypedWeightedCompleteTrs
                (59) CpxTypedWeightedTrsToRntsProof [UPPER BOUND(ID), 0 ms]
                (60) CpxRNTS
                (61) SimplificationProof [BOTH BOUNDS(ID, ID), 0 ms]
                (62) CpxRNTS
    (63) CdtNarrowingProof [BOTH BOUNDS(ID, ID), 0 ms]
    (64) CdtProblem
        (65) CdtRhsSimplificationProcessorProof [BOTH BOUNDS(ID, ID), 0 ms]
        (66) CdtProblem
        (67) CdtNarrowingProof [BOTH BOUNDS(ID, ID), 0 ms]
        (68) CdtProblem
        (69) CdtRhsSimplificationProcessorProof [BOTH BOUNDS(ID, ID), 0 ms]
        (70) CdtProblem
        (71) CdtNarrowingProof [BOTH BOUNDS(ID, ID), 0 ms]
        (72) CdtProblem
        (73) CdtRhsSimplificationProcessorProof [BOTH BOUNDS(ID, ID), 0 ms]
        (74) CdtProblem
        (75) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (76) CdtProblem
        (77) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (78) CdtProblem
        (79) CdtNarrowingProof [BOTH BOUNDS(ID, ID), 0 ms]
        (80) CdtProblem
        (81) CdtNarrowingProof [BOTH BOUNDS(ID, ID), 0 ms]
        (82) CdtProblem
        (83) CdtNarrowingProof [BOTH BOUNDS(ID, ID), 51 ms]
        (84) CdtProblem
        (85) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (86) CdtProblem
        (87) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 21 ms]
        (88) CdtProblem
        (89) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (90) CdtProblem
        (91) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 30 ms]
        (92) CdtProblem
        (93) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 9 ms]
        (94) CdtProblem
        (95) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (96) CdtProblem
        (97) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (98) CdtProblem
        (99) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (100) CdtProblem
        (101) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (102) CdtProblem
        (103) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 13 ms]
        (104) CdtProblem
        (105) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 19 ms]
        (106) CdtProblem
        (107) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 12 ms]
        (108) CdtProblem
        (109) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 9 ms]
        (110) CdtProblem
        (111) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (112) CdtProblem
        (113) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 9 ms]
        (114) CdtProblem
        (115) CdtNarrowingProof [BOTH BOUNDS(ID, ID), 288 ms]
        (116) CdtProblem
        (117) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 13 ms]
        (118) CdtProblem
        (119) CdtNarrowingProof [BOTH BOUNDS(ID, ID), 335 ms]
        (120) CdtProblem
        (121) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 30 ms]
        (122) CdtProblem
        (123) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 11 ms]
        (124) CdtProblem
        (125) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (126) CdtProblem
        (127) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (128) CdtProblem
        (129) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 14 ms]
        (130) CdtProblem
        (131) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 23 ms]
        (132) CdtProblem
        (133) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 28 ms]
        (134) CdtProblem
        (135) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (136) CdtProblem
        (137) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 27 ms]
        (138) CdtProblem
        (139) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 9 ms]
        (140) CdtProblem
        (141) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 55 ms]
        (142) CdtProblem
        (143) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 52 ms]
        (144) CdtProblem
        (145) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 29 ms]
        (146) CdtProblem
        (147) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 7 ms]
        (148) CdtProblem
        (149) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 19 ms]
        (150) CdtProblem
        (151) CdtForwardInstantiationProof [BOTH BOUNDS(ID, ID), 0 ms]
        (152) CdtProblem


----------------------------------------

(0)
Obligation:
The Runtime Complexity (parallel-innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF).


The TRS R consists of the following rules:

   a__2nd(cons(X, cons(Y, Z))) -> mark(Y)
   a__from(X) -> cons(mark(X), from(s(X)))
   mark(2nd(X)) -> a__2nd(mark(X))
   mark(from(X)) -> a__from(mark(X))
   mark(cons(X1, X2)) -> cons(mark(X1), X2)
   mark(s(X)) -> s(mark(X))
   a__2nd(X) -> 2nd(X)
   a__from(X) -> from(X)

S is empty.
Rewrite Strategy: PARALLEL_INNERMOST
----------------------------------------

(1) RenamingProof (BOTH BOUNDS(ID, ID))
Renamed function symbols to avoid clashes with predefined symbol.
----------------------------------------

(2)
Obligation:
The Runtime Complexity (parallel-innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF).


The TRS R consists of the following rules:

   a__2nd(cons(X, cons(Y, Z))) -> mark(Y)
   a__from(X) -> cons(mark(X), from(s(X)))
   mark(2nd(X)) -> a__2nd(mark(X))
   mark(from(X)) -> a__from(mark(X))
   mark(cons(X1, X2)) -> cons(mark(X1), X2)
   mark(s(X)) -> s(mark(X))
   a__2nd(X) -> 2nd(X)
   a__from(X) -> from(X)

S is empty.
Rewrite Strategy: PARALLEL_INNERMOST
----------------------------------------

(3) CpxTrsToCdtProof (UPPER BOUND(ID))
Converted Cpx (relative) TRS with rewrite strategy PARALLEL_INNERMOST to CDT
----------------------------------------

(4)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__2ND(z0) -> c1
   A__FROM(z0) -> c2(MARK(z0))
   A__FROM(z0) -> c3
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
S tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__2ND(z0) -> c1
   A__FROM(z0) -> c2(MARK(z0))
   A__FROM(z0) -> c3
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   A__2ND_1, A__FROM_1, MARK_1

Compound Symbols:   c_1, c1, c2_1, c3, c4_2, c5_2, c6_1, c7_1


----------------------------------------

(5) CdtToCpxRelTrsProof (BOTH BOUNDS(ID, ID))
Converted S to standard rules, and D \ S as well as R to relative rules.
----------------------------------------

(6)
Obligation:
The Runtime Complexity (innermost) of the given CpxRelTRS could be proven to be BOUNDS(n^1, INF).


The TRS R consists of the following rules:

   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__2ND(z0) -> c1
   A__FROM(z0) -> c2(MARK(z0))
   A__FROM(z0) -> c3
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))

The (relative) TRS S consists of the following rules:

   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))

Rewrite Strategy: INNERMOST
----------------------------------------

(7) RenamingProof (BOTH BOUNDS(ID, ID))
Renamed function symbols to avoid clashes with predefined symbol.
----------------------------------------

(8)
Obligation:
The Runtime Complexity (innermost) of the given CpxRelTRS could be proven to be BOUNDS(n^1, INF).


The TRS R consists of the following rules:

   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__2ND(z0) -> c1
   A__FROM(z0) -> c2(MARK(z0))
   A__FROM(z0) -> c3
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))

The (relative) TRS S consists of the following rules:

   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))

Rewrite Strategy: INNERMOST
----------------------------------------

(9) TypeInferenceProof (BOTH BOUNDS(ID, ID))
Inferred types.
----------------------------------------

(10)
Obligation:
Innermost TRS:
Rules:
A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
A__2ND(z0) -> c1
A__FROM(z0) -> c2(MARK(z0))
A__FROM(z0) -> c3
MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
MARK(cons(z0, z1)) -> c6(MARK(z0))
MARK(s(z0)) -> c7(MARK(z0))
a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
a__2nd(z0) -> 2nd(z0)
a__from(z0) -> cons(mark(z0), from(s(z0)))
a__from(z0) -> from(z0)
mark(2nd(z0)) -> a__2nd(mark(z0))
mark(from(z0)) -> a__from(mark(z0))
mark(cons(z0, z1)) -> cons(mark(z0), z1)
mark(s(z0)) -> s(mark(z0))

Types:
A__2ND :: cons:2nd:from:s -> c:c1
cons :: cons:2nd:from:s -> cons:2nd:from:s -> cons:2nd:from:s
c :: c4:c5:c6:c7 -> c:c1
MARK :: cons:2nd:from:s -> c4:c5:c6:c7
c1 :: c:c1
A__FROM :: cons:2nd:from:s -> c2:c3
c2 :: c4:c5:c6:c7 -> c2:c3
c3 :: c2:c3
2nd :: cons:2nd:from:s -> cons:2nd:from:s
c4 :: c:c1 -> c4:c5:c6:c7 -> c4:c5:c6:c7
mark :: cons:2nd:from:s -> cons:2nd:from:s
from :: cons:2nd:from:s -> cons:2nd:from:s
c5 :: c2:c3 -> c4:c5:c6:c7 -> c4:c5:c6:c7
c6 :: c4:c5:c6:c7 -> c4:c5:c6:c7
s :: cons:2nd:from:s -> cons:2nd:from:s
c7 :: c4:c5:c6:c7 -> c4:c5:c6:c7
a__2nd :: cons:2nd:from:s -> cons:2nd:from:s
a__from :: cons:2nd:from:s -> cons:2nd:from:s
hole_c:c11_8 :: c:c1
hole_cons:2nd:from:s2_8 :: cons:2nd:from:s
hole_c4:c5:c6:c73_8 :: c4:c5:c6:c7
hole_c2:c34_8 :: c2:c3
gen_cons:2nd:from:s5_8 :: Nat -> cons:2nd:from:s
gen_c4:c5:c6:c76_8 :: Nat -> c4:c5:c6:c7

----------------------------------------

(11) OrderProof (LOWER BOUND(ID))
Heuristically decided to analyse the following defined symbols:
A__2ND, MARK, A__FROM, mark, a__2nd, a__from

They will be analysed ascendingly in the following order:
A__2ND = MARK
A__2ND = A__FROM
MARK = A__FROM
mark < MARK
mark = a__2nd
mark = a__from
a__2nd = a__from

----------------------------------------

(12)
Obligation:
Innermost TRS:
Rules:
A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
A__2ND(z0) -> c1
A__FROM(z0) -> c2(MARK(z0))
A__FROM(z0) -> c3
MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
MARK(cons(z0, z1)) -> c6(MARK(z0))
MARK(s(z0)) -> c7(MARK(z0))
a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
a__2nd(z0) -> 2nd(z0)
a__from(z0) -> cons(mark(z0), from(s(z0)))
a__from(z0) -> from(z0)
mark(2nd(z0)) -> a__2nd(mark(z0))
mark(from(z0)) -> a__from(mark(z0))
mark(cons(z0, z1)) -> cons(mark(z0), z1)
mark(s(z0)) -> s(mark(z0))

Types:
A__2ND :: cons:2nd:from:s -> c:c1
cons :: cons:2nd:from:s -> cons:2nd:from:s -> cons:2nd:from:s
c :: c4:c5:c6:c7 -> c:c1
MARK :: cons:2nd:from:s -> c4:c5:c6:c7
c1 :: c:c1
A__FROM :: cons:2nd:from:s -> c2:c3
c2 :: c4:c5:c6:c7 -> c2:c3
c3 :: c2:c3
2nd :: cons:2nd:from:s -> cons:2nd:from:s
c4 :: c:c1 -> c4:c5:c6:c7 -> c4:c5:c6:c7
mark :: cons:2nd:from:s -> cons:2nd:from:s
from :: cons:2nd:from:s -> cons:2nd:from:s
c5 :: c2:c3 -> c4:c5:c6:c7 -> c4:c5:c6:c7
c6 :: c4:c5:c6:c7 -> c4:c5:c6:c7
s :: cons:2nd:from:s -> cons:2nd:from:s
c7 :: c4:c5:c6:c7 -> c4:c5:c6:c7
a__2nd :: cons:2nd:from:s -> cons:2nd:from:s
a__from :: cons:2nd:from:s -> cons:2nd:from:s
hole_c:c11_8 :: c:c1
hole_cons:2nd:from:s2_8 :: cons:2nd:from:s
hole_c4:c5:c6:c73_8 :: c4:c5:c6:c7
hole_c2:c34_8 :: c2:c3
gen_cons:2nd:from:s5_8 :: Nat -> cons:2nd:from:s
gen_c4:c5:c6:c76_8 :: Nat -> c4:c5:c6:c7


Generator Equations:
gen_cons:2nd:from:s5_8(0) <=> hole_cons:2nd:from:s2_8
gen_cons:2nd:from:s5_8(+(x, 1)) <=> cons(gen_cons:2nd:from:s5_8(x), hole_cons:2nd:from:s2_8)
gen_c4:c5:c6:c76_8(0) <=> hole_c4:c5:c6:c73_8
gen_c4:c5:c6:c76_8(+(x, 1)) <=> c4(c(hole_c4:c5:c6:c73_8), gen_c4:c5:c6:c76_8(x))


The following defined symbols remain to be analysed:
a__2nd, A__2ND, MARK, A__FROM, mark, a__from

They will be analysed ascendingly in the following order:
A__2ND = MARK
A__2ND = A__FROM
MARK = A__FROM
mark < MARK
mark = a__2nd
mark = a__from
a__2nd = a__from

----------------------------------------

(13) RewriteLemmaProof (LOWER BOUND(ID))
Proved the following rewrite lemma:
mark(gen_cons:2nd:from:s5_8(+(1, n16_8))) -> *7_8, rt in Omega(0)

Induction Base:
mark(gen_cons:2nd:from:s5_8(+(1, 0)))

Induction Step:
mark(gen_cons:2nd:from:s5_8(+(1, +(n16_8, 1)))) ->_R^Omega(0)
cons(mark(gen_cons:2nd:from:s5_8(+(1, n16_8))), hole_cons:2nd:from:s2_8) ->_IH
cons(*7_8, hole_cons:2nd:from:s2_8)

We have rt in Omega(1) and sz in O(n). Thus, we have irc_R in Omega(n^0).
----------------------------------------

(14)
Obligation:
Innermost TRS:
Rules:
A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
A__2ND(z0) -> c1
A__FROM(z0) -> c2(MARK(z0))
A__FROM(z0) -> c3
MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
MARK(cons(z0, z1)) -> c6(MARK(z0))
MARK(s(z0)) -> c7(MARK(z0))
a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
a__2nd(z0) -> 2nd(z0)
a__from(z0) -> cons(mark(z0), from(s(z0)))
a__from(z0) -> from(z0)
mark(2nd(z0)) -> a__2nd(mark(z0))
mark(from(z0)) -> a__from(mark(z0))
mark(cons(z0, z1)) -> cons(mark(z0), z1)
mark(s(z0)) -> s(mark(z0))

Types:
A__2ND :: cons:2nd:from:s -> c:c1
cons :: cons:2nd:from:s -> cons:2nd:from:s -> cons:2nd:from:s
c :: c4:c5:c6:c7 -> c:c1
MARK :: cons:2nd:from:s -> c4:c5:c6:c7
c1 :: c:c1
A__FROM :: cons:2nd:from:s -> c2:c3
c2 :: c4:c5:c6:c7 -> c2:c3
c3 :: c2:c3
2nd :: cons:2nd:from:s -> cons:2nd:from:s
c4 :: c:c1 -> c4:c5:c6:c7 -> c4:c5:c6:c7
mark :: cons:2nd:from:s -> cons:2nd:from:s
from :: cons:2nd:from:s -> cons:2nd:from:s
c5 :: c2:c3 -> c4:c5:c6:c7 -> c4:c5:c6:c7
c6 :: c4:c5:c6:c7 -> c4:c5:c6:c7
s :: cons:2nd:from:s -> cons:2nd:from:s
c7 :: c4:c5:c6:c7 -> c4:c5:c6:c7
a__2nd :: cons:2nd:from:s -> cons:2nd:from:s
a__from :: cons:2nd:from:s -> cons:2nd:from:s
hole_c:c11_8 :: c:c1
hole_cons:2nd:from:s2_8 :: cons:2nd:from:s
hole_c4:c5:c6:c73_8 :: c4:c5:c6:c7
hole_c2:c34_8 :: c2:c3
gen_cons:2nd:from:s5_8 :: Nat -> cons:2nd:from:s
gen_c4:c5:c6:c76_8 :: Nat -> c4:c5:c6:c7


Lemmas:
mark(gen_cons:2nd:from:s5_8(+(1, n16_8))) -> *7_8, rt in Omega(0)


Generator Equations:
gen_cons:2nd:from:s5_8(0) <=> hole_cons:2nd:from:s2_8
gen_cons:2nd:from:s5_8(+(x, 1)) <=> cons(gen_cons:2nd:from:s5_8(x), hole_cons:2nd:from:s2_8)
gen_c4:c5:c6:c76_8(0) <=> hole_c4:c5:c6:c73_8
gen_c4:c5:c6:c76_8(+(x, 1)) <=> c4(c(hole_c4:c5:c6:c73_8), gen_c4:c5:c6:c76_8(x))


The following defined symbols remain to be analysed:
a__from, A__2ND, MARK, A__FROM, a__2nd

They will be analysed ascendingly in the following order:
A__2ND = MARK
A__2ND = A__FROM
MARK = A__FROM
mark < MARK
mark = a__2nd
mark = a__from
a__2nd = a__from

----------------------------------------

(15) RewriteLemmaProof (LOWER BOUND(ID))
Proved the following rewrite lemma:
MARK(gen_cons:2nd:from:s5_8(+(1, n3204_8))) -> *7_8, rt in Omega(n3204_8)

Induction Base:
MARK(gen_cons:2nd:from:s5_8(+(1, 0)))

Induction Step:
MARK(gen_cons:2nd:from:s5_8(+(1, +(n3204_8, 1)))) ->_R^Omega(1)
c6(MARK(gen_cons:2nd:from:s5_8(+(1, n3204_8)))) ->_IH
c6(*7_8)

We have rt in Omega(n^1) and sz in O(n). Thus, we have irc_R in Omega(n).
----------------------------------------

(16)
Complex Obligation (BEST)

----------------------------------------

(17)
Obligation:
Proved the lower bound n^1 for the following obligation:

Innermost TRS:
Rules:
A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
A__2ND(z0) -> c1
A__FROM(z0) -> c2(MARK(z0))
A__FROM(z0) -> c3
MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
MARK(cons(z0, z1)) -> c6(MARK(z0))
MARK(s(z0)) -> c7(MARK(z0))
a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
a__2nd(z0) -> 2nd(z0)
a__from(z0) -> cons(mark(z0), from(s(z0)))
a__from(z0) -> from(z0)
mark(2nd(z0)) -> a__2nd(mark(z0))
mark(from(z0)) -> a__from(mark(z0))
mark(cons(z0, z1)) -> cons(mark(z0), z1)
mark(s(z0)) -> s(mark(z0))

Types:
A__2ND :: cons:2nd:from:s -> c:c1
cons :: cons:2nd:from:s -> cons:2nd:from:s -> cons:2nd:from:s
c :: c4:c5:c6:c7 -> c:c1
MARK :: cons:2nd:from:s -> c4:c5:c6:c7
c1 :: c:c1
A__FROM :: cons:2nd:from:s -> c2:c3
c2 :: c4:c5:c6:c7 -> c2:c3
c3 :: c2:c3
2nd :: cons:2nd:from:s -> cons:2nd:from:s
c4 :: c:c1 -> c4:c5:c6:c7 -> c4:c5:c6:c7
mark :: cons:2nd:from:s -> cons:2nd:from:s
from :: cons:2nd:from:s -> cons:2nd:from:s
c5 :: c2:c3 -> c4:c5:c6:c7 -> c4:c5:c6:c7
c6 :: c4:c5:c6:c7 -> c4:c5:c6:c7
s :: cons:2nd:from:s -> cons:2nd:from:s
c7 :: c4:c5:c6:c7 -> c4:c5:c6:c7
a__2nd :: cons:2nd:from:s -> cons:2nd:from:s
a__from :: cons:2nd:from:s -> cons:2nd:from:s
hole_c:c11_8 :: c:c1
hole_cons:2nd:from:s2_8 :: cons:2nd:from:s
hole_c4:c5:c6:c73_8 :: c4:c5:c6:c7
hole_c2:c34_8 :: c2:c3
gen_cons:2nd:from:s5_8 :: Nat -> cons:2nd:from:s
gen_c4:c5:c6:c76_8 :: Nat -> c4:c5:c6:c7


Lemmas:
mark(gen_cons:2nd:from:s5_8(+(1, n16_8))) -> *7_8, rt in Omega(0)


Generator Equations:
gen_cons:2nd:from:s5_8(0) <=> hole_cons:2nd:from:s2_8
gen_cons:2nd:from:s5_8(+(x, 1)) <=> cons(gen_cons:2nd:from:s5_8(x), hole_cons:2nd:from:s2_8)
gen_c4:c5:c6:c76_8(0) <=> hole_c4:c5:c6:c73_8
gen_c4:c5:c6:c76_8(+(x, 1)) <=> c4(c(hole_c4:c5:c6:c73_8), gen_c4:c5:c6:c76_8(x))


The following defined symbols remain to be analysed:
MARK, A__2ND, A__FROM

They will be analysed ascendingly in the following order:
A__2ND = MARK
A__2ND = A__FROM
MARK = A__FROM

----------------------------------------

(18) LowerBoundPropagationProof (FINISHED)
Propagated lower bound.
----------------------------------------

(19)
BOUNDS(n^1, INF)

----------------------------------------

(20)
Obligation:
Innermost TRS:
Rules:
A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
A__2ND(z0) -> c1
A__FROM(z0) -> c2(MARK(z0))
A__FROM(z0) -> c3
MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
MARK(cons(z0, z1)) -> c6(MARK(z0))
MARK(s(z0)) -> c7(MARK(z0))
a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
a__2nd(z0) -> 2nd(z0)
a__from(z0) -> cons(mark(z0), from(s(z0)))
a__from(z0) -> from(z0)
mark(2nd(z0)) -> a__2nd(mark(z0))
mark(from(z0)) -> a__from(mark(z0))
mark(cons(z0, z1)) -> cons(mark(z0), z1)
mark(s(z0)) -> s(mark(z0))

Types:
A__2ND :: cons:2nd:from:s -> c:c1
cons :: cons:2nd:from:s -> cons:2nd:from:s -> cons:2nd:from:s
c :: c4:c5:c6:c7 -> c:c1
MARK :: cons:2nd:from:s -> c4:c5:c6:c7
c1 :: c:c1
A__FROM :: cons:2nd:from:s -> c2:c3
c2 :: c4:c5:c6:c7 -> c2:c3
c3 :: c2:c3
2nd :: cons:2nd:from:s -> cons:2nd:from:s
c4 :: c:c1 -> c4:c5:c6:c7 -> c4:c5:c6:c7
mark :: cons:2nd:from:s -> cons:2nd:from:s
from :: cons:2nd:from:s -> cons:2nd:from:s
c5 :: c2:c3 -> c4:c5:c6:c7 -> c4:c5:c6:c7
c6 :: c4:c5:c6:c7 -> c4:c5:c6:c7
s :: cons:2nd:from:s -> cons:2nd:from:s
c7 :: c4:c5:c6:c7 -> c4:c5:c6:c7
a__2nd :: cons:2nd:from:s -> cons:2nd:from:s
a__from :: cons:2nd:from:s -> cons:2nd:from:s
hole_c:c11_8 :: c:c1
hole_cons:2nd:from:s2_8 :: cons:2nd:from:s
hole_c4:c5:c6:c73_8 :: c4:c5:c6:c7
hole_c2:c34_8 :: c2:c3
gen_cons:2nd:from:s5_8 :: Nat -> cons:2nd:from:s
gen_c4:c5:c6:c76_8 :: Nat -> c4:c5:c6:c7


Lemmas:
mark(gen_cons:2nd:from:s5_8(+(1, n16_8))) -> *7_8, rt in Omega(0)
MARK(gen_cons:2nd:from:s5_8(+(1, n3204_8))) -> *7_8, rt in Omega(n3204_8)


Generator Equations:
gen_cons:2nd:from:s5_8(0) <=> hole_cons:2nd:from:s2_8
gen_cons:2nd:from:s5_8(+(x, 1)) <=> cons(gen_cons:2nd:from:s5_8(x), hole_cons:2nd:from:s2_8)
gen_c4:c5:c6:c76_8(0) <=> hole_c4:c5:c6:c73_8
gen_c4:c5:c6:c76_8(+(x, 1)) <=> c4(c(hole_c4:c5:c6:c73_8), gen_c4:c5:c6:c76_8(x))


The following defined symbols remain to be analysed:
A__2ND, A__FROM

They will be analysed ascendingly in the following order:
A__2ND = MARK
A__2ND = A__FROM
MARK = A__FROM

----------------------------------------

(21) RelTrsToTrsProof (UPPER BOUND(ID))
transformed relative TRS to TRS
----------------------------------------

(22)
Obligation:
The Runtime Complexity (parallel-innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF).


The TRS R consists of the following rules:

   a__2nd(cons(X, cons(Y, Z))) -> mark(Y)
   a__from(X) -> cons(mark(X), from(s(X)))
   mark(2nd(X)) -> a__2nd(mark(X))
   mark(from(X)) -> a__from(mark(X))
   mark(cons(X1, X2)) -> cons(mark(X1), X2)
   mark(s(X)) -> s(mark(X))
   a__2nd(X) -> 2nd(X)
   a__from(X) -> from(X)

S is empty.
Rewrite Strategy: PARALLEL_INNERMOST
----------------------------------------

(23) RelTrsToWeightedTrsProof (UPPER BOUND(ID))
Transformed relative TRS to weighted TRS
----------------------------------------

(24)
Obligation:
The Runtime Complexity (innermost) of the given CpxWeightedTrs could be proven to be BOUNDS(1, INF).


The TRS R consists of the following rules:

   a__2nd(cons(X, cons(Y, Z))) -> mark(Y) [1]
   a__from(X) -> cons(mark(X), from(s(X))) [1]
   mark(2nd(X)) -> a__2nd(mark(X)) [1]
   mark(from(X)) -> a__from(mark(X)) [1]
   mark(cons(X1, X2)) -> cons(mark(X1), X2) [1]
   mark(s(X)) -> s(mark(X)) [1]
   a__2nd(X) -> 2nd(X) [1]
   a__from(X) -> from(X) [1]

Rewrite Strategy: INNERMOST
----------------------------------------

(25) TypeInferenceProof (BOTH BOUNDS(ID, ID))
Infered types.
----------------------------------------

(26)
Obligation:
Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   a__2nd(cons(X, cons(Y, Z))) -> mark(Y) [1]
   a__from(X) -> cons(mark(X), from(s(X))) [1]
   mark(2nd(X)) -> a__2nd(mark(X)) [1]
   mark(from(X)) -> a__from(mark(X)) [1]
   mark(cons(X1, X2)) -> cons(mark(X1), X2) [1]
   mark(s(X)) -> s(mark(X)) [1]
   a__2nd(X) -> 2nd(X) [1]
   a__from(X) -> from(X) [1]

The TRS has the following type information:
a__2nd :: cons:s:from:2nd -> cons:s:from:2nd
cons :: cons:s:from:2nd -> cons:s:from:2nd -> cons:s:from:2nd
mark :: cons:s:from:2nd -> cons:s:from:2nd
a__from :: cons:s:from:2nd -> cons:s:from:2nd
from :: cons:s:from:2nd -> cons:s:from:2nd
s :: cons:s:from:2nd -> cons:s:from:2nd
2nd :: cons:s:from:2nd -> cons:s:from:2nd

Rewrite Strategy: INNERMOST
----------------------------------------

(27) CompletionProof (UPPER BOUND(ID))
The transformation into a RNTS is sound, since:

(a) The obligation is a constructor system where every type has a constant constructor,

(b) The following defined symbols do not have to be completely defined, as they can never occur inside other defined symbols:
none

(c) The following functions are completely defined:

   mark_1
   a__2nd_1
   a__from_1

Due to the following rules being added:

   mark(v0) -> const [0]

And the following fresh constants:    const

----------------------------------------

(28)
Obligation:
Runtime Complexity Weighted TRS where critical functions are completely defined. The underlying TRS is:

Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   a__2nd(cons(X, cons(Y, Z))) -> mark(Y) [1]
   a__from(X) -> cons(mark(X), from(s(X))) [1]
   mark(2nd(X)) -> a__2nd(mark(X)) [1]
   mark(from(X)) -> a__from(mark(X)) [1]
   mark(cons(X1, X2)) -> cons(mark(X1), X2) [1]
   mark(s(X)) -> s(mark(X)) [1]
   a__2nd(X) -> 2nd(X) [1]
   a__from(X) -> from(X) [1]
   mark(v0) -> const [0]

The TRS has the following type information:
a__2nd :: cons:s:from:2nd:const -> cons:s:from:2nd:const
cons :: cons:s:from:2nd:const -> cons:s:from:2nd:const -> cons:s:from:2nd:const
mark :: cons:s:from:2nd:const -> cons:s:from:2nd:const
a__from :: cons:s:from:2nd:const -> cons:s:from:2nd:const
from :: cons:s:from:2nd:const -> cons:s:from:2nd:const
s :: cons:s:from:2nd:const -> cons:s:from:2nd:const
2nd :: cons:s:from:2nd:const -> cons:s:from:2nd:const
const :: cons:s:from:2nd:const

Rewrite Strategy: INNERMOST
----------------------------------------

(29) NarrowingProof (BOTH BOUNDS(ID, ID))
Narrowed the inner basic terms of all right-hand sides by a single narrowing step.
----------------------------------------

(30)
Obligation:
Runtime Complexity Weighted TRS where critical functions are completely defined. The underlying TRS is:

Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   a__2nd(cons(X, cons(Y, Z))) -> mark(Y) [1]
   a__from(X) -> cons(mark(X), from(s(X))) [1]
   mark(2nd(2nd(X'))) -> a__2nd(a__2nd(mark(X'))) [2]
   mark(2nd(from(X''))) -> a__2nd(a__from(mark(X''))) [2]
   mark(2nd(cons(X1', X2'))) -> a__2nd(cons(mark(X1'), X2')) [2]
   mark(2nd(s(X3))) -> a__2nd(s(mark(X3))) [2]
   mark(2nd(X)) -> a__2nd(const) [1]
   mark(from(2nd(X4))) -> a__from(a__2nd(mark(X4))) [2]
   mark(from(from(X5))) -> a__from(a__from(mark(X5))) [2]
   mark(from(cons(X1'', X2''))) -> a__from(cons(mark(X1''), X2'')) [2]
   mark(from(s(X6))) -> a__from(s(mark(X6))) [2]
   mark(from(X)) -> a__from(const) [1]
   mark(cons(X1, X2)) -> cons(mark(X1), X2) [1]
   mark(s(X)) -> s(mark(X)) [1]
   a__2nd(X) -> 2nd(X) [1]
   a__from(X) -> from(X) [1]
   mark(v0) -> const [0]

The TRS has the following type information:
a__2nd :: cons:s:from:2nd:const -> cons:s:from:2nd:const
cons :: cons:s:from:2nd:const -> cons:s:from:2nd:const -> cons:s:from:2nd:const
mark :: cons:s:from:2nd:const -> cons:s:from:2nd:const
a__from :: cons:s:from:2nd:const -> cons:s:from:2nd:const
from :: cons:s:from:2nd:const -> cons:s:from:2nd:const
s :: cons:s:from:2nd:const -> cons:s:from:2nd:const
2nd :: cons:s:from:2nd:const -> cons:s:from:2nd:const
const :: cons:s:from:2nd:const

Rewrite Strategy: INNERMOST
----------------------------------------

(31) CpxTypedWeightedTrsToRntsProof (UPPER BOUND(ID))
Transformed the TRS into an over-approximating RNTS by (improved) Size Abstraction.
The constant constructors are abstracted as follows:

   const => 0

----------------------------------------

(32)
Obligation:
Complexity RNTS consisting of the following rules:

   a__2nd(z) -{ 1 }-> mark(Y) :|: z = 1 + X + (1 + Y + Z), Z >= 0, Y >= 0, X >= 0
   a__2nd(z) -{ 1 }-> 1 + X :|: X >= 0, z = X
   a__from(z) -{ 1 }-> 1 + X :|: X >= 0, z = X
   a__from(z) -{ 1 }-> 1 + mark(X) + (1 + (1 + X)) :|: X >= 0, z = X
   mark(z) -{ 2 }-> a__from(a__from(mark(X5))) :|: X5 >= 0, z = 1 + (1 + X5)
   mark(z) -{ 2 }-> a__from(a__2nd(mark(X4))) :|: z = 1 + (1 + X4), X4 >= 0
   mark(z) -{ 1 }-> a__from(0) :|: z = 1 + X, X >= 0
   mark(z) -{ 2 }-> a__from(1 + mark(X6)) :|: X6 >= 0, z = 1 + (1 + X6)
   mark(z) -{ 2 }-> a__from(1 + mark(X1'') + X2'') :|: X1'' >= 0, z = 1 + (1 + X1'' + X2''), X2'' >= 0
   mark(z) -{ 2 }-> a__2nd(a__from(mark(X''))) :|: z = 1 + (1 + X''), X'' >= 0
   mark(z) -{ 2 }-> a__2nd(a__2nd(mark(X'))) :|: X' >= 0, z = 1 + (1 + X')
   mark(z) -{ 1 }-> a__2nd(0) :|: z = 1 + X, X >= 0
   mark(z) -{ 2 }-> a__2nd(1 + mark(X3)) :|: z = 1 + (1 + X3), X3 >= 0
   mark(z) -{ 2 }-> a__2nd(1 + mark(X1') + X2') :|: z = 1 + (1 + X1' + X2'), X2' >= 0, X1' >= 0
   mark(z) -{ 0 }-> 0 :|: v0 >= 0, z = v0
   mark(z) -{ 1 }-> 1 + mark(X) :|: z = 1 + X, X >= 0
   mark(z) -{ 1 }-> 1 + mark(X1) + X2 :|: X1 >= 0, X2 >= 0, z = 1 + X1 + X2


----------------------------------------

(33) SimplificationProof (BOTH BOUNDS(ID, ID))
Simplified the RNTS by moving equalities from the constraints into the right-hand sides.
----------------------------------------

(34)
Obligation:
Complexity RNTS consisting of the following rules:

   a__2nd(z) -{ 1 }-> mark(Y) :|: z = 1 + X + (1 + Y + Z), Z >= 0, Y >= 0, X >= 0
   a__2nd(z) -{ 1 }-> 1 + z :|: z >= 0
   a__from(z) -{ 1 }-> 1 + z :|: z >= 0
   a__from(z) -{ 1 }-> 1 + mark(z) + (1 + (1 + z)) :|: z >= 0
   mark(z) -{ 2 }-> a__from(a__from(mark(z - 2))) :|: z - 2 >= 0
   mark(z) -{ 2 }-> a__from(a__2nd(mark(z - 2))) :|: z - 2 >= 0
   mark(z) -{ 1 }-> a__from(0) :|: z - 1 >= 0
   mark(z) -{ 2 }-> a__from(1 + mark(z - 2)) :|: z - 2 >= 0
   mark(z) -{ 2 }-> a__from(1 + mark(X1'') + X2'') :|: X1'' >= 0, z = 1 + (1 + X1'' + X2''), X2'' >= 0
   mark(z) -{ 2 }-> a__2nd(a__from(mark(z - 2))) :|: z - 2 >= 0
   mark(z) -{ 2 }-> a__2nd(a__2nd(mark(z - 2))) :|: z - 2 >= 0
   mark(z) -{ 1 }-> a__2nd(0) :|: z - 1 >= 0
   mark(z) -{ 2 }-> a__2nd(1 + mark(z - 2)) :|: z - 2 >= 0
   mark(z) -{ 2 }-> a__2nd(1 + mark(X1') + X2') :|: z = 1 + (1 + X1' + X2'), X2' >= 0, X1' >= 0
   mark(z) -{ 0 }-> 0 :|: z >= 0
   mark(z) -{ 1 }-> 1 + mark(z - 1) :|: z - 1 >= 0
   mark(z) -{ 1 }-> 1 + mark(X1) + X2 :|: X1 >= 0, X2 >= 0, z = 1 + X1 + X2


----------------------------------------

(35) CompletionProof (UPPER BOUND(ID))
The TRS is a completely defined constructor system, as every type has a constant constructor and the following rules were added:

   mark(v0) -> null_mark [0]

And the following fresh constants:    null_mark

----------------------------------------

(36)
Obligation:
Runtime Complexity Weighted TRS where all functions are completely defined. The underlying TRS is:

Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   a__2nd(cons(X, cons(Y, Z))) -> mark(Y) [1]
   a__from(X) -> cons(mark(X), from(s(X))) [1]
   mark(2nd(X)) -> a__2nd(mark(X)) [1]
   mark(from(X)) -> a__from(mark(X)) [1]
   mark(cons(X1, X2)) -> cons(mark(X1), X2) [1]
   mark(s(X)) -> s(mark(X)) [1]
   a__2nd(X) -> 2nd(X) [1]
   a__from(X) -> from(X) [1]
   mark(v0) -> null_mark [0]

The TRS has the following type information:
a__2nd :: cons:s:from:2nd:null_mark -> cons:s:from:2nd:null_mark
cons :: cons:s:from:2nd:null_mark -> cons:s:from:2nd:null_mark -> cons:s:from:2nd:null_mark
mark :: cons:s:from:2nd:null_mark -> cons:s:from:2nd:null_mark
a__from :: cons:s:from:2nd:null_mark -> cons:s:from:2nd:null_mark
from :: cons:s:from:2nd:null_mark -> cons:s:from:2nd:null_mark
s :: cons:s:from:2nd:null_mark -> cons:s:from:2nd:null_mark
2nd :: cons:s:from:2nd:null_mark -> cons:s:from:2nd:null_mark
null_mark :: cons:s:from:2nd:null_mark

Rewrite Strategy: INNERMOST
----------------------------------------

(37) CpxTypedWeightedTrsToRntsProof (UPPER BOUND(ID))
Transformed the TRS into an over-approximating RNTS by (improved) Size Abstraction.
The constant constructors are abstracted as follows:

   null_mark => 0

----------------------------------------

(38)
Obligation:
Complexity RNTS consisting of the following rules:

   a__2nd(z) -{ 1 }-> mark(Y) :|: z = 1 + X + (1 + Y + Z), Z >= 0, Y >= 0, X >= 0
   a__2nd(z) -{ 1 }-> 1 + X :|: X >= 0, z = X
   a__from(z) -{ 1 }-> 1 + X :|: X >= 0, z = X
   a__from(z) -{ 1 }-> 1 + mark(X) + (1 + (1 + X)) :|: X >= 0, z = X
   mark(z) -{ 1 }-> a__from(mark(X)) :|: z = 1 + X, X >= 0
   mark(z) -{ 1 }-> a__2nd(mark(X)) :|: z = 1 + X, X >= 0
   mark(z) -{ 0 }-> 0 :|: v0 >= 0, z = v0
   mark(z) -{ 1 }-> 1 + mark(X) :|: z = 1 + X, X >= 0
   mark(z) -{ 1 }-> 1 + mark(X1) + X2 :|: X1 >= 0, X2 >= 0, z = 1 + X1 + X2

Only complete derivations are relevant for the runtime complexity.

----------------------------------------

(39) CpxTrsToCdtProof (UPPER BOUND(ID))
Converted Cpx (relative) TRS with rewrite strategy PARALLEL_INNERMOST to CDT
----------------------------------------

(40)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__2ND(z0) -> c1
   A__FROM(z0) -> c2(MARK(z0))
   A__FROM(z0) -> c3
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
S tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__2ND(z0) -> c1
   A__FROM(z0) -> c2(MARK(z0))
   A__FROM(z0) -> c3
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   A__2ND_1, A__FROM_1, MARK_1

Compound Symbols:   c_1, c1, c2_1, c3, c4_2, c5_2, c6_1, c7_1


----------------------------------------

(41) CdtLeafRemovalProof (BOTH BOUNDS(ID, ID))
Removed 2 trailing nodes:
   A__FROM(z0) -> c3
   A__2ND(z0) -> c1

----------------------------------------

(42)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
S tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   A__2ND_1, A__FROM_1, MARK_1

Compound Symbols:   c_1, c2_1, c4_2, c5_2, c6_1, c7_1


----------------------------------------

(43) CdtToCpxRelTrsProof (BOTH BOUNDS(ID, ID))
Converted S to standard rules, and D \ S as well as R to relative rules.
----------------------------------------

(44)
Obligation:
The Runtime Complexity (innermost) of the given CpxRelTRS could be proven to be BOUNDS(1, INF).


The TRS R consists of the following rules:

   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))

The (relative) TRS S consists of the following rules:

   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))

Rewrite Strategy: INNERMOST
----------------------------------------

(45) RelTrsToTrsProof (UPPER BOUND(ID))
transformed relative TRS to TRS
----------------------------------------

(46)
Obligation:
The Runtime Complexity (innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF).


The TRS R consists of the following rules:

   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))

S is empty.
Rewrite Strategy: INNERMOST
----------------------------------------

(47) RelTrsToWeightedTrsProof (BOTH BOUNDS(ID, ID))
Transformed relative TRS to weighted TRS
----------------------------------------

(48)
Obligation:
The Runtime Complexity (innermost) of the given CpxWeightedTrs could be proven to be BOUNDS(1, INF).


The TRS R consists of the following rules:

   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1)) [1]
   A__FROM(z0) -> c2(MARK(z0)) [1]
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0)) [1]
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0)) [1]
   MARK(cons(z0, z1)) -> c6(MARK(z0)) [1]
   MARK(s(z0)) -> c7(MARK(z0)) [1]
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1) [0]
   a__2nd(z0) -> 2nd(z0) [0]
   a__from(z0) -> cons(mark(z0), from(s(z0))) [0]
   a__from(z0) -> from(z0) [0]
   mark(2nd(z0)) -> a__2nd(mark(z0)) [0]
   mark(from(z0)) -> a__from(mark(z0)) [0]
   mark(cons(z0, z1)) -> cons(mark(z0), z1) [0]
   mark(s(z0)) -> s(mark(z0)) [0]

Rewrite Strategy: INNERMOST
----------------------------------------

(49) TypeInferenceProof (BOTH BOUNDS(ID, ID))
Infered types.
----------------------------------------

(50)
Obligation:
Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1)) [1]
   A__FROM(z0) -> c2(MARK(z0)) [1]
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0)) [1]
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0)) [1]
   MARK(cons(z0, z1)) -> c6(MARK(z0)) [1]
   MARK(s(z0)) -> c7(MARK(z0)) [1]
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1) [0]
   a__2nd(z0) -> 2nd(z0) [0]
   a__from(z0) -> cons(mark(z0), from(s(z0))) [0]
   a__from(z0) -> from(z0) [0]
   mark(2nd(z0)) -> a__2nd(mark(z0)) [0]
   mark(from(z0)) -> a__from(mark(z0)) [0]
   mark(cons(z0, z1)) -> cons(mark(z0), z1) [0]
   mark(s(z0)) -> s(mark(z0)) [0]

The TRS has the following type information:
A__2ND :: cons:2nd:from:s -> c
cons :: cons:2nd:from:s -> cons:2nd:from:s -> cons:2nd:from:s
c :: c4:c5:c6:c7 -> c
MARK :: cons:2nd:from:s -> c4:c5:c6:c7
A__FROM :: cons:2nd:from:s -> c2
c2 :: c4:c5:c6:c7 -> c2
2nd :: cons:2nd:from:s -> cons:2nd:from:s
c4 :: c -> c4:c5:c6:c7 -> c4:c5:c6:c7
mark :: cons:2nd:from:s -> cons:2nd:from:s
from :: cons:2nd:from:s -> cons:2nd:from:s
c5 :: c2 -> c4:c5:c6:c7 -> c4:c5:c6:c7
c6 :: c4:c5:c6:c7 -> c4:c5:c6:c7
s :: cons:2nd:from:s -> cons:2nd:from:s
c7 :: c4:c5:c6:c7 -> c4:c5:c6:c7
a__2nd :: cons:2nd:from:s -> cons:2nd:from:s
a__from :: cons:2nd:from:s -> cons:2nd:from:s

Rewrite Strategy: INNERMOST
----------------------------------------

(51) CompletionProof (UPPER BOUND(ID))
The TRS is a completely defined constructor system, as every type has a constant constructor and the following rules were added:

   a__2nd(v0) -> null_a__2nd [0]
   a__from(v0) -> null_a__from [0]
   mark(v0) -> null_mark [0]
   A__2ND(v0) -> null_A__2ND [0]
   MARK(v0) -> null_MARK [0]

And the following fresh constants:    null_a__2nd, null_a__from, null_mark, null_A__2ND, null_MARK, const

----------------------------------------

(52)
Obligation:
Runtime Complexity Weighted TRS where all functions are completely defined. The underlying TRS is:

Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1)) [1]
   A__FROM(z0) -> c2(MARK(z0)) [1]
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0)) [1]
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0)) [1]
   MARK(cons(z0, z1)) -> c6(MARK(z0)) [1]
   MARK(s(z0)) -> c7(MARK(z0)) [1]
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1) [0]
   a__2nd(z0) -> 2nd(z0) [0]
   a__from(z0) -> cons(mark(z0), from(s(z0))) [0]
   a__from(z0) -> from(z0) [0]
   mark(2nd(z0)) -> a__2nd(mark(z0)) [0]
   mark(from(z0)) -> a__from(mark(z0)) [0]
   mark(cons(z0, z1)) -> cons(mark(z0), z1) [0]
   mark(s(z0)) -> s(mark(z0)) [0]
   a__2nd(v0) -> null_a__2nd [0]
   a__from(v0) -> null_a__from [0]
   mark(v0) -> null_mark [0]
   A__2ND(v0) -> null_A__2ND [0]
   MARK(v0) -> null_MARK [0]

The TRS has the following type information:
A__2ND :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> c:null_A__2ND
cons :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> cons:2nd:from:s:null_a__2nd:null_a__from:null_mark
c :: c4:c5:c6:c7:null_MARK -> c:null_A__2ND
MARK :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> c4:c5:c6:c7:null_MARK
A__FROM :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> c2
c2 :: c4:c5:c6:c7:null_MARK -> c2
2nd :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> cons:2nd:from:s:null_a__2nd:null_a__from:null_mark
c4 :: c:null_A__2ND -> c4:c5:c6:c7:null_MARK -> c4:c5:c6:c7:null_MARK
mark :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> cons:2nd:from:s:null_a__2nd:null_a__from:null_mark
from :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> cons:2nd:from:s:null_a__2nd:null_a__from:null_mark
c5 :: c2 -> c4:c5:c6:c7:null_MARK -> c4:c5:c6:c7:null_MARK
c6 :: c4:c5:c6:c7:null_MARK -> c4:c5:c6:c7:null_MARK
s :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> cons:2nd:from:s:null_a__2nd:null_a__from:null_mark
c7 :: c4:c5:c6:c7:null_MARK -> c4:c5:c6:c7:null_MARK
a__2nd :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> cons:2nd:from:s:null_a__2nd:null_a__from:null_mark
a__from :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark -> cons:2nd:from:s:null_a__2nd:null_a__from:null_mark
null_a__2nd :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark
null_a__from :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark
null_mark :: cons:2nd:from:s:null_a__2nd:null_a__from:null_mark
null_A__2ND :: c:null_A__2ND
null_MARK :: c4:c5:c6:c7:null_MARK
const :: c2

Rewrite Strategy: INNERMOST
----------------------------------------

(53) CpxTypedWeightedTrsToRntsProof (UPPER BOUND(ID))
Transformed the TRS into an over-approximating RNTS by (improved) Size Abstraction.
The constant constructors are abstracted as follows:

   null_a__2nd => 0
   null_a__from => 0
   null_mark => 0
   null_A__2ND => 0
   null_MARK => 0
   const => 0

----------------------------------------

(54)
Obligation:
Complexity RNTS consisting of the following rules:

   A__2ND(z) -{ 0 }-> 0 :|: v0 >= 0, z = v0
   A__2ND(z) -{ 1 }-> 1 + MARK(z1) :|: z1 >= 0, z = 1 + z0 + (1 + z1 + z2), z0 >= 0, z2 >= 0
   A__FROM(z) -{ 1 }-> 1 + MARK(z0) :|: z = z0, z0 >= 0
   MARK(z) -{ 0 }-> 0 :|: v0 >= 0, z = v0
   MARK(z) -{ 1 }-> 1 + MARK(z0) :|: z1 >= 0, z0 >= 0, z = 1 + z0 + z1
   MARK(z) -{ 1 }-> 1 + MARK(z0) :|: z = 1 + z0, z0 >= 0
   MARK(z) -{ 1 }-> 1 + A__FROM(mark(z0)) + MARK(z0) :|: z = 1 + z0, z0 >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(mark(z0)) + MARK(z0) :|: z = 1 + z0, z0 >= 0
   a__2nd(z) -{ 0 }-> mark(z1) :|: z1 >= 0, z = 1 + z0 + (1 + z1 + z2), z0 >= 0, z2 >= 0
   a__2nd(z) -{ 0 }-> 0 :|: v0 >= 0, z = v0
   a__2nd(z) -{ 0 }-> 1 + z0 :|: z = z0, z0 >= 0
   a__from(z) -{ 0 }-> 0 :|: v0 >= 0, z = v0
   a__from(z) -{ 0 }-> 1 + z0 :|: z = z0, z0 >= 0
   a__from(z) -{ 0 }-> 1 + mark(z0) + (1 + (1 + z0)) :|: z = z0, z0 >= 0
   mark(z) -{ 0 }-> a__from(mark(z0)) :|: z = 1 + z0, z0 >= 0
   mark(z) -{ 0 }-> a__2nd(mark(z0)) :|: z = 1 + z0, z0 >= 0
   mark(z) -{ 0 }-> 0 :|: v0 >= 0, z = v0
   mark(z) -{ 0 }-> 1 + mark(z0) :|: z = 1 + z0, z0 >= 0
   mark(z) -{ 0 }-> 1 + mark(z0) + z1 :|: z1 >= 0, z0 >= 0, z = 1 + z0 + z1

Only complete derivations are relevant for the runtime complexity.

----------------------------------------

(55) CompletionProof (UPPER BOUND(ID))
The transformation into a RNTS is sound, since:

(a) The obligation is a constructor system where every type has a constant constructor,

(b) The following defined symbols do not have to be completely defined, as they can never occur inside other defined symbols:

   A__2ND_1
   A__FROM_1
   MARK_1

(c) The following functions are completely defined:

   a__2nd_1
   a__from_1
   mark_1

Due to the following rules being added:

   a__2nd(v0) -> const1 [0]
   a__from(v0) -> const1 [0]
   mark(v0) -> const1 [0]

And the following fresh constants:    const1, const, const2, const3

----------------------------------------

(56)
Obligation:
Runtime Complexity Weighted TRS where critical functions are completely defined. The underlying TRS is:

Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1)) [1]
   A__FROM(z0) -> c2(MARK(z0)) [1]
   MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0)) [1]
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0)) [1]
   MARK(cons(z0, z1)) -> c6(MARK(z0)) [1]
   MARK(s(z0)) -> c7(MARK(z0)) [1]
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1) [0]
   a__2nd(z0) -> 2nd(z0) [0]
   a__from(z0) -> cons(mark(z0), from(s(z0))) [0]
   a__from(z0) -> from(z0) [0]
   mark(2nd(z0)) -> a__2nd(mark(z0)) [0]
   mark(from(z0)) -> a__from(mark(z0)) [0]
   mark(cons(z0, z1)) -> cons(mark(z0), z1) [0]
   mark(s(z0)) -> s(mark(z0)) [0]
   a__2nd(v0) -> const1 [0]
   a__from(v0) -> const1 [0]
   mark(v0) -> const1 [0]

The TRS has the following type information:
A__2ND :: cons:2nd:from:s:const1 -> c
cons :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
c :: c4:c5:c6:c7 -> c
MARK :: cons:2nd:from:s:const1 -> c4:c5:c6:c7
A__FROM :: cons:2nd:from:s:const1 -> c2
c2 :: c4:c5:c6:c7 -> c2
2nd :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
c4 :: c -> c4:c5:c6:c7 -> c4:c5:c6:c7
mark :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
from :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
c5 :: c2 -> c4:c5:c6:c7 -> c4:c5:c6:c7
c6 :: c4:c5:c6:c7 -> c4:c5:c6:c7
s :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
c7 :: c4:c5:c6:c7 -> c4:c5:c6:c7
a__2nd :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
a__from :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
const1 :: cons:2nd:from:s:const1
const :: c
const2 :: c4:c5:c6:c7
const3 :: c2

Rewrite Strategy: INNERMOST
----------------------------------------

(57) NarrowingProof (BOTH BOUNDS(ID, ID))
Narrowed the inner basic terms of all right-hand sides by a single narrowing step.
----------------------------------------

(58)
Obligation:
Runtime Complexity Weighted TRS where critical functions are completely defined. The underlying TRS is:

Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1)) [1]
   A__FROM(z0) -> c2(MARK(z0)) [1]
   MARK(2nd(2nd(z0'))) -> c4(A__2ND(a__2nd(mark(z0'))), MARK(2nd(z0'))) [1]
   MARK(2nd(from(z0''))) -> c4(A__2ND(a__from(mark(z0''))), MARK(from(z0''))) [1]
   MARK(2nd(cons(z01, z1'))) -> c4(A__2ND(cons(mark(z01), z1')), MARK(cons(z01, z1'))) [1]
   MARK(2nd(s(z02))) -> c4(A__2ND(s(mark(z02))), MARK(s(z02))) [1]
   MARK(2nd(z0)) -> c4(A__2ND(const1), MARK(z0)) [1]
   MARK(from(2nd(z03))) -> c5(A__FROM(a__2nd(mark(z03))), MARK(2nd(z03))) [1]
   MARK(from(from(z04))) -> c5(A__FROM(a__from(mark(z04))), MARK(from(z04))) [1]
   MARK(from(cons(z05, z1''))) -> c5(A__FROM(cons(mark(z05), z1'')), MARK(cons(z05, z1''))) [1]
   MARK(from(s(z06))) -> c5(A__FROM(s(mark(z06))), MARK(s(z06))) [1]
   MARK(from(z0)) -> c5(A__FROM(const1), MARK(z0)) [1]
   MARK(cons(z0, z1)) -> c6(MARK(z0)) [1]
   MARK(s(z0)) -> c7(MARK(z0)) [1]
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1) [0]
   a__2nd(z0) -> 2nd(z0) [0]
   a__from(z0) -> cons(mark(z0), from(s(z0))) [0]
   a__from(z0) -> from(z0) [0]
   mark(2nd(2nd(z07))) -> a__2nd(a__2nd(mark(z07))) [0]
   mark(2nd(from(z08))) -> a__2nd(a__from(mark(z08))) [0]
   mark(2nd(cons(z09, z11))) -> a__2nd(cons(mark(z09), z11)) [0]
   mark(2nd(s(z010))) -> a__2nd(s(mark(z010))) [0]
   mark(2nd(z0)) -> a__2nd(const1) [0]
   mark(from(2nd(z011))) -> a__from(a__2nd(mark(z011))) [0]
   mark(from(from(z012))) -> a__from(a__from(mark(z012))) [0]
   mark(from(cons(z013, z12))) -> a__from(cons(mark(z013), z12)) [0]
   mark(from(s(z014))) -> a__from(s(mark(z014))) [0]
   mark(from(z0)) -> a__from(const1) [0]
   mark(cons(z0, z1)) -> cons(mark(z0), z1) [0]
   mark(s(z0)) -> s(mark(z0)) [0]
   a__2nd(v0) -> const1 [0]
   a__from(v0) -> const1 [0]
   mark(v0) -> const1 [0]

The TRS has the following type information:
A__2ND :: cons:2nd:from:s:const1 -> c
cons :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
c :: c4:c5:c6:c7 -> c
MARK :: cons:2nd:from:s:const1 -> c4:c5:c6:c7
A__FROM :: cons:2nd:from:s:const1 -> c2
c2 :: c4:c5:c6:c7 -> c2
2nd :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
c4 :: c -> c4:c5:c6:c7 -> c4:c5:c6:c7
mark :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
from :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
c5 :: c2 -> c4:c5:c6:c7 -> c4:c5:c6:c7
c6 :: c4:c5:c6:c7 -> c4:c5:c6:c7
s :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
c7 :: c4:c5:c6:c7 -> c4:c5:c6:c7
a__2nd :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
a__from :: cons:2nd:from:s:const1 -> cons:2nd:from:s:const1
const1 :: cons:2nd:from:s:const1
const :: c
const2 :: c4:c5:c6:c7
const3 :: c2

Rewrite Strategy: INNERMOST
----------------------------------------

(59) CpxTypedWeightedTrsToRntsProof (UPPER BOUND(ID))
Transformed the TRS into an over-approximating RNTS by (improved) Size Abstraction.
The constant constructors are abstracted as follows:

   const1 => 0
   const => 0
   const2 => 0
   const3 => 0

----------------------------------------

(60)
Obligation:
Complexity RNTS consisting of the following rules:

   A__2ND(z) -{ 1 }-> 1 + MARK(z1) :|: z1 >= 0, z = 1 + z0 + (1 + z1 + z2), z0 >= 0, z2 >= 0
   A__FROM(z) -{ 1 }-> 1 + MARK(z0) :|: z = z0, z0 >= 0
   MARK(z) -{ 1 }-> 1 + MARK(z0) :|: z1 >= 0, z0 >= 0, z = 1 + z0 + z1
   MARK(z) -{ 1 }-> 1 + MARK(z0) :|: z = 1 + z0, z0 >= 0
   MARK(z) -{ 1 }-> 1 + A__FROM(a__from(mark(z04))) + MARK(1 + z04) :|: z04 >= 0, z = 1 + (1 + z04)
   MARK(z) -{ 1 }-> 1 + A__FROM(a__2nd(mark(z03))) + MARK(1 + z03) :|: z = 1 + (1 + z03), z03 >= 0
   MARK(z) -{ 1 }-> 1 + A__FROM(0) + MARK(z0) :|: z = 1 + z0, z0 >= 0
   MARK(z) -{ 1 }-> 1 + A__FROM(1 + mark(z06)) + MARK(1 + z06) :|: z06 >= 0, z = 1 + (1 + z06)
   MARK(z) -{ 1 }-> 1 + A__FROM(1 + mark(z05) + z1'') + MARK(1 + z05 + z1'') :|: z = 1 + (1 + z05 + z1''), z05 >= 0, z1'' >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(a__from(mark(z0''))) + MARK(1 + z0'') :|: z = 1 + (1 + z0''), z0'' >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(a__2nd(mark(z0'))) + MARK(1 + z0') :|: z = 1 + (1 + z0'), z0' >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(0) + MARK(z0) :|: z = 1 + z0, z0 >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(1 + mark(z02)) + MARK(1 + z02) :|: z = 1 + (1 + z02), z02 >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(1 + mark(z01) + z1') + MARK(1 + z01 + z1') :|: z = 1 + (1 + z01 + z1'), z01 >= 0, z1' >= 0
   a__2nd(z) -{ 0 }-> mark(z1) :|: z1 >= 0, z = 1 + z0 + (1 + z1 + z2), z0 >= 0, z2 >= 0
   a__2nd(z) -{ 0 }-> 0 :|: v0 >= 0, z = v0
   a__2nd(z) -{ 0 }-> 1 + z0 :|: z = z0, z0 >= 0
   a__from(z) -{ 0 }-> 0 :|: v0 >= 0, z = v0
   a__from(z) -{ 0 }-> 1 + z0 :|: z = z0, z0 >= 0
   a__from(z) -{ 0 }-> 1 + mark(z0) + (1 + (1 + z0)) :|: z = z0, z0 >= 0
   mark(z) -{ 0 }-> a__from(a__from(mark(z012))) :|: z012 >= 0, z = 1 + (1 + z012)
   mark(z) -{ 0 }-> a__from(a__2nd(mark(z011))) :|: z = 1 + (1 + z011), z011 >= 0
   mark(z) -{ 0 }-> a__from(0) :|: z = 1 + z0, z0 >= 0
   mark(z) -{ 0 }-> a__from(1 + mark(z014)) :|: z = 1 + (1 + z014), z014 >= 0
   mark(z) -{ 0 }-> a__from(1 + mark(z013) + z12) :|: z013 >= 0, z12 >= 0, z = 1 + (1 + z013 + z12)
   mark(z) -{ 0 }-> a__2nd(a__from(mark(z08))) :|: z08 >= 0, z = 1 + (1 + z08)
   mark(z) -{ 0 }-> a__2nd(a__2nd(mark(z07))) :|: z = 1 + (1 + z07), z07 >= 0
   mark(z) -{ 0 }-> a__2nd(0) :|: z = 1 + z0, z0 >= 0
   mark(z) -{ 0 }-> a__2nd(1 + mark(z010)) :|: z = 1 + (1 + z010), z010 >= 0
   mark(z) -{ 0 }-> a__2nd(1 + mark(z09) + z11) :|: z = 1 + (1 + z09 + z11), z11 >= 0, z09 >= 0
   mark(z) -{ 0 }-> 0 :|: v0 >= 0, z = v0
   mark(z) -{ 0 }-> 1 + mark(z0) :|: z = 1 + z0, z0 >= 0
   mark(z) -{ 0 }-> 1 + mark(z0) + z1 :|: z1 >= 0, z0 >= 0, z = 1 + z0 + z1


----------------------------------------

(61) SimplificationProof (BOTH BOUNDS(ID, ID))
Simplified the RNTS by moving equalities from the constraints into the right-hand sides.
----------------------------------------

(62)
Obligation:
Complexity RNTS consisting of the following rules:

   A__2ND(z) -{ 1 }-> 1 + MARK(z1) :|: z1 >= 0, z = 1 + z0 + (1 + z1 + z2), z0 >= 0, z2 >= 0
   A__FROM(z) -{ 1 }-> 1 + MARK(z) :|: z >= 0
   MARK(z) -{ 1 }-> 1 + MARK(z0) :|: z1 >= 0, z0 >= 0, z = 1 + z0 + z1
   MARK(z) -{ 1 }-> 1 + MARK(z - 1) :|: z - 1 >= 0
   MARK(z) -{ 1 }-> 1 + A__FROM(a__from(mark(z - 2))) + MARK(1 + (z - 2)) :|: z - 2 >= 0
   MARK(z) -{ 1 }-> 1 + A__FROM(a__2nd(mark(z - 2))) + MARK(1 + (z - 2)) :|: z - 2 >= 0
   MARK(z) -{ 1 }-> 1 + A__FROM(0) + MARK(z - 1) :|: z - 1 >= 0
   MARK(z) -{ 1 }-> 1 + A__FROM(1 + mark(z - 2)) + MARK(1 + (z - 2)) :|: z - 2 >= 0
   MARK(z) -{ 1 }-> 1 + A__FROM(1 + mark(z05) + z1'') + MARK(1 + z05 + z1'') :|: z = 1 + (1 + z05 + z1''), z05 >= 0, z1'' >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(a__from(mark(z - 2))) + MARK(1 + (z - 2)) :|: z - 2 >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(a__2nd(mark(z - 2))) + MARK(1 + (z - 2)) :|: z - 2 >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(0) + MARK(z - 1) :|: z - 1 >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(1 + mark(z - 2)) + MARK(1 + (z - 2)) :|: z - 2 >= 0
   MARK(z) -{ 1 }-> 1 + A__2ND(1 + mark(z01) + z1') + MARK(1 + z01 + z1') :|: z = 1 + (1 + z01 + z1'), z01 >= 0, z1' >= 0
   a__2nd(z) -{ 0 }-> mark(z1) :|: z1 >= 0, z = 1 + z0 + (1 + z1 + z2), z0 >= 0, z2 >= 0
   a__2nd(z) -{ 0 }-> 0 :|: z >= 0
   a__2nd(z) -{ 0 }-> 1 + z :|: z >= 0
   a__from(z) -{ 0 }-> 0 :|: z >= 0
   a__from(z) -{ 0 }-> 1 + z :|: z >= 0
   a__from(z) -{ 0 }-> 1 + mark(z) + (1 + (1 + z)) :|: z >= 0
   mark(z) -{ 0 }-> a__from(a__from(mark(z - 2))) :|: z - 2 >= 0
   mark(z) -{ 0 }-> a__from(a__2nd(mark(z - 2))) :|: z - 2 >= 0
   mark(z) -{ 0 }-> a__from(0) :|: z - 1 >= 0
   mark(z) -{ 0 }-> a__from(1 + mark(z - 2)) :|: z - 2 >= 0
   mark(z) -{ 0 }-> a__from(1 + mark(z013) + z12) :|: z013 >= 0, z12 >= 0, z = 1 + (1 + z013 + z12)
   mark(z) -{ 0 }-> a__2nd(a__from(mark(z - 2))) :|: z - 2 >= 0
   mark(z) -{ 0 }-> a__2nd(a__2nd(mark(z - 2))) :|: z - 2 >= 0
   mark(z) -{ 0 }-> a__2nd(0) :|: z - 1 >= 0
   mark(z) -{ 0 }-> a__2nd(1 + mark(z - 2)) :|: z - 2 >= 0
   mark(z) -{ 0 }-> a__2nd(1 + mark(z09) + z11) :|: z = 1 + (1 + z09 + z11), z11 >= 0, z09 >= 0
   mark(z) -{ 0 }-> 0 :|: z >= 0
   mark(z) -{ 0 }-> 1 + mark(z - 1) :|: z - 1 >= 0
   mark(z) -{ 0 }-> 1 + mark(z0) + z1 :|: z1 >= 0, z0 >= 0, z = 1 + z0 + z1


----------------------------------------

(63) CdtNarrowingProof (BOTH BOUNDS(ID, ID))
Use narrowing to replace MARK(2nd(z0)) -> c4(A__2ND(mark(z0)), MARK(z0)) by 
   MARK(2nd(2nd(z0))) -> c4(A__2ND(a__2nd(mark(z0))), MARK(2nd(z0)))
   MARK(2nd(from(z0))) -> c4(A__2ND(a__from(mark(z0))), MARK(from(z0)))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(A__2ND(s(mark(z0))), MARK(s(z0)))

----------------------------------------

(64)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(2nd(z0))) -> c4(A__2ND(a__2nd(mark(z0))), MARK(2nd(z0)))
   MARK(2nd(from(z0))) -> c4(A__2ND(a__from(mark(z0))), MARK(from(z0)))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(A__2ND(s(mark(z0))), MARK(s(z0)))
S tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(2nd(z0))) -> c4(A__2ND(a__2nd(mark(z0))), MARK(2nd(z0)))
   MARK(2nd(from(z0))) -> c4(A__2ND(a__from(mark(z0))), MARK(from(z0)))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(A__2ND(s(mark(z0))), MARK(s(z0)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   A__2ND_1, A__FROM_1, MARK_1

Compound Symbols:   c_1, c2_1, c5_2, c6_1, c7_1, c4_2


----------------------------------------

(65) CdtRhsSimplificationProcessorProof (BOTH BOUNDS(ID, ID))
Removed 1 trailing tuple parts
----------------------------------------

(66)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(2nd(z0))) -> c4(A__2ND(a__2nd(mark(z0))), MARK(2nd(z0)))
   MARK(2nd(from(z0))) -> c4(A__2ND(a__from(mark(z0))), MARK(from(z0)))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
S tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(2nd(z0))) -> c4(A__2ND(a__2nd(mark(z0))), MARK(2nd(z0)))
   MARK(2nd(from(z0))) -> c4(A__2ND(a__from(mark(z0))), MARK(from(z0)))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   A__2ND_1, A__FROM_1, MARK_1

Compound Symbols:   c_1, c2_1, c5_2, c6_1, c7_1, c4_2, c4_1


----------------------------------------

(67) CdtNarrowingProof (BOTH BOUNDS(ID, ID))
Use narrowing to replace MARK(2nd(2nd(z0))) -> c4(A__2ND(a__2nd(mark(z0))), MARK(2nd(z0))) by 
   MARK(2nd(2nd(x0))) -> c4(A__2ND(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))

----------------------------------------

(68)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(from(z0))) -> c4(A__2ND(a__from(mark(z0))), MARK(from(z0)))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(x0))) -> c4(A__2ND(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
S tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(from(z0))) -> c4(A__2ND(a__from(mark(z0))), MARK(from(z0)))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(x0))) -> c4(A__2ND(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   A__2ND_1, A__FROM_1, MARK_1

Compound Symbols:   c_1, c2_1, c5_2, c6_1, c7_1, c4_2, c4_1


----------------------------------------

(69) CdtRhsSimplificationProcessorProof (BOTH BOUNDS(ID, ID))
Removed 1 trailing tuple parts
----------------------------------------

(70)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(from(z0))) -> c4(A__2ND(a__from(mark(z0))), MARK(from(z0)))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
S tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(from(z0))) -> c4(A__2ND(a__from(mark(z0))), MARK(from(z0)))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   A__2ND_1, A__FROM_1, MARK_1

Compound Symbols:   c_1, c2_1, c5_2, c6_1, c7_1, c4_2, c4_1


----------------------------------------

(71) CdtNarrowingProof (BOTH BOUNDS(ID, ID))
Use narrowing to replace MARK(2nd(from(z0))) -> c4(A__2ND(a__from(mark(z0))), MARK(from(z0))) by 
   MARK(2nd(from(x0))) -> c4(A__2ND(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(2nd(from(x0))) -> c4(A__2ND(from(mark(x0))), MARK(from(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))

----------------------------------------

(72)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(x0))) -> c4(A__2ND(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(2nd(from(x0))) -> c4(A__2ND(from(mark(x0))), MARK(from(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
S tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(x0))) -> c4(A__2ND(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(2nd(from(x0))) -> c4(A__2ND(from(mark(x0))), MARK(from(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   A__2ND_1, A__FROM_1, MARK_1

Compound Symbols:   c_1, c2_1, c5_2, c6_1, c7_1, c4_2, c4_1


----------------------------------------

(73) CdtRhsSimplificationProcessorProof (BOTH BOUNDS(ID, ID))
Removed 2 trailing tuple parts
----------------------------------------

(74)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
S tuples:
   A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1))
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   A__2ND_1, A__FROM_1, MARK_1

Compound Symbols:   c_1, c2_1, c5_2, c6_1, c7_1, c4_2, c4_1


----------------------------------------

(75) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__2ND(cons(z0, cons(z1, z2))) -> c(MARK(z1)) by 
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))

----------------------------------------

(76)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
S tuples:
   A__FROM(z0) -> c2(MARK(z0))
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   A__FROM_1, MARK_1, A__2ND_1

Compound Symbols:   c2_1, c5_2, c6_1, c7_1, c4_2, c4_1, c_1


----------------------------------------

(77) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__FROM(z0) -> c2(MARK(z0)) by 
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))

----------------------------------------

(78)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
S tuples:
   MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0))
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c5_2, c6_1, c7_1, c4_2, c4_1, c_1, c2_1


----------------------------------------

(79) CdtNarrowingProof (BOTH BOUNDS(ID, ID))
Use narrowing to replace MARK(from(z0)) -> c5(A__FROM(mark(z0)), MARK(z0)) by 
   MARK(from(2nd(z0))) -> c5(A__FROM(a__2nd(mark(z0))), MARK(2nd(z0)))
   MARK(from(from(z0))) -> c5(A__FROM(a__from(mark(z0))), MARK(from(z0)))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))

----------------------------------------

(80)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(2nd(z0))) -> c5(A__FROM(a__2nd(mark(z0))), MARK(2nd(z0)))
   MARK(from(from(z0))) -> c5(A__FROM(a__from(mark(z0))), MARK(from(z0)))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
S tuples:
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(2nd(z0))) -> c5(A__FROM(a__2nd(mark(z0))), MARK(2nd(z0)))
   MARK(from(from(z0))) -> c5(A__FROM(a__from(mark(z0))), MARK(from(z0)))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c6_1, c7_1, c4_2, c4_1, c_1, c2_1, c5_2


----------------------------------------

(81) CdtNarrowingProof (BOTH BOUNDS(ID, ID))
Use narrowing to replace MARK(from(2nd(z0))) -> c5(A__FROM(a__2nd(mark(z0))), MARK(2nd(z0))) by 
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))

----------------------------------------

(82)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(from(z0))) -> c5(A__FROM(a__from(mark(z0))), MARK(from(z0)))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
S tuples:
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(from(z0))) -> c5(A__FROM(a__from(mark(z0))), MARK(from(z0)))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c6_1, c7_1, c4_2, c4_1, c_1, c2_1, c5_2


----------------------------------------

(83) CdtNarrowingProof (BOTH BOUNDS(ID, ID))
Use narrowing to replace MARK(from(from(z0))) -> c5(A__FROM(a__from(mark(z0))), MARK(from(z0))) by 
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))

----------------------------------------

(84)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
S tuples:
   MARK(cons(z0, z1)) -> c6(MARK(z0))
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c6_1, c7_1, c4_2, c4_1, c_1, c2_1, c5_2


----------------------------------------

(85) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(cons(z0, z1)) -> c6(MARK(z0)) by 
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))

----------------------------------------

(86)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
S tuples:
   MARK(s(z0)) -> c7(MARK(z0))
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c7_1, c4_2, c4_1, c_1, c2_1, c5_2, c6_1


----------------------------------------

(87) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(s(z0)) -> c7(MARK(z0)) by 
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))

----------------------------------------

(88)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(s(z0))) -> c4(MARK(s(z0)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c4_1, c_1, c2_1, c5_2, c6_1, c7_1


----------------------------------------

(89) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(2nd(s(z0))) -> c4(MARK(s(z0))) by 
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))

----------------------------------------

(90)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0)))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c4_1, c_1, c2_1, c5_2, c6_1, c7_1


----------------------------------------

(91) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(2nd(2nd(x0))) -> c4(MARK(2nd(x0))) by 
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))

----------------------------------------

(92)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c4_1, c_1, c2_1, c5_2, c6_1, c7_1


----------------------------------------

(93) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(2nd(from(x0))) -> c4(MARK(from(x0))) by 
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))

----------------------------------------

(94)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c4_1, c_1, c2_1, c5_2, c6_1, c7_1


----------------------------------------

(95) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(2nd(from(x0))) -> c4(MARK(from(x0))) by 
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))

----------------------------------------

(96)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(2nd(from(x0))) -> c4(MARK(from(x0)))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
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   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c4_1, c_1, c2_1, c5_2, c6_1, c7_1


----------------------------------------

(97) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(2nd(from(x0))) -> c4(MARK(from(x0))) by 
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))

----------------------------------------

(98)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0)))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
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   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(99) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__2ND(cons(z0, cons(from(y0), z2))) -> c(MARK(from(y0))) by 
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))

----------------------------------------

(100)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1)))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
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   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(101) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__2ND(cons(z0, cons(cons(y0, y1), z2))) -> c(MARK(cons(y0, y1))) by 
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))

----------------------------------------

(102)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
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   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0)))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(103) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__2ND(cons(z0, cons(s(y0), z2))) -> c(MARK(s(y0))) by 
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))

----------------------------------------

(104)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
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   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
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   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(105) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__2ND(cons(z0, cons(2nd(s(y0)), z2))) -> c(MARK(2nd(s(y0)))) by 
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))

----------------------------------------

(106)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
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   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
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   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(107) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__2ND(cons(z0, cons(2nd(2nd(y0)), z2))) -> c(MARK(2nd(2nd(y0)))) by 
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))

----------------------------------------

(108)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
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   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
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   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
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   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
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   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(109) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__2ND(cons(z0, cons(2nd(from(y0)), z2))) -> c(MARK(2nd(from(y0)))) by 
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))

----------------------------------------

(110)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(from(y0)) -> c2(MARK(from(y0)))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
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   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(111) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__FROM(from(y0)) -> c2(MARK(from(y0))) by 
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))

----------------------------------------

(112)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
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   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1)))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
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   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(113) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__FROM(cons(y0, y1)) -> c2(MARK(cons(y0, y1))) by 
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))

----------------------------------------

(114)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
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   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
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   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(115) CdtNarrowingProof (BOTH BOUNDS(ID, ID))
Use narrowing to replace MARK(from(cons(z0, z1))) -> c5(A__FROM(cons(mark(z0), z1)), MARK(cons(z0, z1))) by 
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))

----------------------------------------

(116)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
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   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(s(y0)) -> c2(MARK(s(y0)))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
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   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(117) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__FROM(s(y0)) -> c2(MARK(s(y0))) by 
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))

----------------------------------------

(118)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
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   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0)))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
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   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(119) CdtNarrowingProof (BOTH BOUNDS(ID, ID))
Use narrowing to replace MARK(from(s(z0))) -> c5(A__FROM(s(mark(z0))), MARK(s(z0))) by 
   MARK(from(s(2nd(z0)))) -> c5(A__FROM(s(a__2nd(mark(z0)))), MARK(s(2nd(z0))))
   MARK(from(s(from(z0)))) -> c5(A__FROM(s(a__from(mark(z0)))), MARK(s(from(z0))))
   MARK(from(s(cons(z0, z1)))) -> c5(A__FROM(s(cons(mark(z0), z1))), MARK(s(cons(z0, z1))))
   MARK(from(s(s(z0)))) -> c5(A__FROM(s(s(mark(z0)))), MARK(s(s(z0))))

----------------------------------------

(120)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
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   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(from(s(2nd(z0)))) -> c5(A__FROM(s(a__2nd(mark(z0)))), MARK(s(2nd(z0))))
   MARK(from(s(from(z0)))) -> c5(A__FROM(s(a__from(mark(z0)))), MARK(s(from(z0))))
   MARK(from(s(cons(z0, z1)))) -> c5(A__FROM(s(cons(mark(z0), z1))), MARK(s(cons(z0, z1))))
   MARK(from(s(s(z0)))) -> c5(A__FROM(s(s(mark(z0)))), MARK(s(s(z0))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
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   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(from(s(2nd(z0)))) -> c5(A__FROM(s(a__2nd(mark(z0)))), MARK(s(2nd(z0))))
   MARK(from(s(from(z0)))) -> c5(A__FROM(s(a__from(mark(z0)))), MARK(s(from(z0))))
   MARK(from(s(cons(z0, z1)))) -> c5(A__FROM(s(cons(mark(z0), z1))), MARK(s(cons(z0, z1))))
   MARK(from(s(s(z0)))) -> c5(A__FROM(s(s(mark(z0)))), MARK(s(s(z0))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(121) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__FROM(2nd(s(y0))) -> c2(MARK(2nd(s(y0)))) by 
   A__FROM(2nd(s(s(y0)))) -> c2(MARK(2nd(s(s(y0)))))
   A__FROM(2nd(s(2nd(cons(y0, y1))))) -> c2(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__FROM(2nd(s(from(2nd(from(y0)))))) -> c2(MARK(2nd(s(from(2nd(from(y0)))))))
   A__FROM(2nd(s(from(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(from(2nd(s(y0)))))) -> c2(MARK(2nd(s(from(2nd(s(y0)))))))
   A__FROM(2nd(s(from(from(y0))))) -> c2(MARK(2nd(s(from(from(y0))))))
   A__FROM(2nd(s(from(from(2nd(y0)))))) -> c2(MARK(2nd(s(from(from(2nd(y0)))))))
   A__FROM(2nd(s(from(from(from(y0)))))) -> c2(MARK(2nd(s(from(from(from(y0)))))))
   A__FROM(2nd(s(from(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__FROM(2nd(s(from(from(s(y0)))))) -> c2(MARK(2nd(s(from(from(s(y0)))))))
   A__FROM(2nd(s(cons(cons(y0, y1), y2)))) -> c2(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__FROM(2nd(s(cons(s(y0), y1)))) -> c2(MARK(2nd(s(cons(s(y0), y1)))))
   A__FROM(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(2nd(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(from(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(s(y0))), y1)))))

----------------------------------------

(122)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
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   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
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   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
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   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
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   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
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   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
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   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__FROM(2nd(s(from(2nd(from(y0)))))) -> c2(MARK(2nd(s(from(2nd(from(y0)))))))
   A__FROM(2nd(s(from(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(from(2nd(s(y0)))))) -> c2(MARK(2nd(s(from(2nd(s(y0)))))))
   A__FROM(2nd(s(from(from(y0))))) -> c2(MARK(2nd(s(from(from(y0))))))
   A__FROM(2nd(s(from(from(2nd(y0)))))) -> c2(MARK(2nd(s(from(from(2nd(y0)))))))
   A__FROM(2nd(s(from(from(from(y0)))))) -> c2(MARK(2nd(s(from(from(from(y0)))))))
   A__FROM(2nd(s(from(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__FROM(2nd(s(from(from(s(y0)))))) -> c2(MARK(2nd(s(from(from(s(y0)))))))
   A__FROM(2nd(s(cons(cons(y0, y1), y2)))) -> c2(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__FROM(2nd(s(cons(s(y0), y1)))) -> c2(MARK(2nd(s(cons(s(y0), y1)))))
   A__FROM(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(2nd(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(from(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
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   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
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   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(from(s(2nd(z0)))) -> c5(A__FROM(s(a__2nd(mark(z0)))), MARK(s(2nd(z0))))
   MARK(from(s(from(z0)))) -> c5(A__FROM(s(a__from(mark(z0)))), MARK(s(from(z0))))
   MARK(from(s(cons(z0, z1)))) -> c5(A__FROM(s(cons(mark(z0), z1))), MARK(s(cons(z0, z1))))
   MARK(from(s(s(z0)))) -> c5(A__FROM(s(s(mark(z0)))), MARK(s(s(z0))))
   A__FROM(2nd(s(s(y0)))) -> c2(MARK(2nd(s(s(y0)))))
   A__FROM(2nd(s(2nd(cons(y0, y1))))) -> c2(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__FROM(2nd(s(from(2nd(from(y0)))))) -> c2(MARK(2nd(s(from(2nd(from(y0)))))))
   A__FROM(2nd(s(from(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(from(2nd(s(y0)))))) -> c2(MARK(2nd(s(from(2nd(s(y0)))))))
   A__FROM(2nd(s(from(from(y0))))) -> c2(MARK(2nd(s(from(from(y0))))))
   A__FROM(2nd(s(from(from(2nd(y0)))))) -> c2(MARK(2nd(s(from(from(2nd(y0)))))))
   A__FROM(2nd(s(from(from(from(y0)))))) -> c2(MARK(2nd(s(from(from(from(y0)))))))
   A__FROM(2nd(s(from(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__FROM(2nd(s(from(from(s(y0)))))) -> c2(MARK(2nd(s(from(from(s(y0)))))))
   A__FROM(2nd(s(cons(cons(y0, y1), y2)))) -> c2(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__FROM(2nd(s(cons(s(y0), y1)))) -> c2(MARK(2nd(s(cons(s(y0), y1)))))
   A__FROM(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(2nd(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(from(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(123) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__FROM(2nd(2nd(y0))) -> c2(MARK(2nd(2nd(y0)))) by 
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(2nd(2nd(2nd(y0))))) -> c2(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__FROM(2nd(2nd(2nd(from(y0))))) -> c2(MARK(2nd(2nd(2nd(from(y0))))))
   A__FROM(2nd(2nd(2nd(cons(y0, y1))))) -> c2(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__FROM(2nd(2nd(2nd(s(y0))))) -> c2(MARK(2nd(2nd(2nd(s(y0))))))
   A__FROM(2nd(2nd(from(2nd(y0))))) -> c2(MARK(2nd(2nd(from(2nd(y0))))))
   A__FROM(2nd(2nd(from(from(y0))))) -> c2(MARK(2nd(2nd(from(from(y0))))))
   A__FROM(2nd(2nd(from(cons(y0, y1))))) -> c2(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__FROM(2nd(2nd(from(s(y0))))) -> c2(MARK(2nd(2nd(from(s(y0))))))
   A__FROM(2nd(2nd(s(s(y0))))) -> c2(MARK(2nd(2nd(s(s(y0))))))
   A__FROM(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(2nd(s(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__FROM(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__FROM(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__FROM(2nd(2nd(s(from(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(from(s(y0)))))) -> c2(MARK(2nd(2nd(s(from(s(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(from(from(y0)))))) -> c2(MARK(2nd(2nd(s(from(from(y0)))))))
   A__FROM(2nd(2nd(s(from(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__FROM(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__FROM(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c2(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__FROM(2nd(2nd(s(cons(s(y0), y1))))) -> c2(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))

----------------------------------------

(124)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
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   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
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   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
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   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
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   A__FROM(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__FROM(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__FROM(2nd(2nd(s(from(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(from(s(y0)))))) -> c2(MARK(2nd(2nd(s(from(s(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(from(from(y0)))))) -> c2(MARK(2nd(2nd(s(from(from(y0)))))))
   A__FROM(2nd(2nd(s(from(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__FROM(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__FROM(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c2(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__FROM(2nd(2nd(s(cons(s(y0), y1))))) -> c2(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
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   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
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   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
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   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
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   A__FROM(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__FROM(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__FROM(2nd(2nd(s(from(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(from(s(y0)))))) -> c2(MARK(2nd(2nd(s(from(s(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(from(from(y0)))))) -> c2(MARK(2nd(2nd(s(from(from(y0)))))))
   A__FROM(2nd(2nd(s(from(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__FROM(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__FROM(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c2(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__FROM(2nd(2nd(s(cons(s(y0), y1))))) -> c2(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(125) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace A__FROM(2nd(from(y0))) -> c2(MARK(2nd(from(y0)))) by 
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(from(2nd(2nd(y0))))) -> c2(MARK(2nd(from(2nd(2nd(y0))))))
   A__FROM(2nd(from(2nd(from(y0))))) -> c2(MARK(2nd(from(2nd(from(y0))))))
   A__FROM(2nd(from(2nd(cons(y0, y1))))) -> c2(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__FROM(2nd(from(2nd(s(y0))))) -> c2(MARK(2nd(from(2nd(s(y0))))))
   A__FROM(2nd(from(from(2nd(y0))))) -> c2(MARK(2nd(from(from(2nd(y0))))))
   A__FROM(2nd(from(from(from(y0))))) -> c2(MARK(2nd(from(from(from(y0))))))
   A__FROM(2nd(from(from(cons(y0, y1))))) -> c2(MARK(2nd(from(from(cons(y0, y1))))))
   A__FROM(2nd(from(from(s(y0))))) -> c2(MARK(2nd(from(from(s(y0))))))

----------------------------------------

(126)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
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   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
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   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
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   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
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   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
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   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
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   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
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   MARK(from(s(from(z0)))) -> c5(A__FROM(s(a__from(mark(z0)))), MARK(s(from(z0))))
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   MARK(from(s(s(z0)))) -> c5(A__FROM(s(s(mark(z0)))), MARK(s(s(z0))))
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   A__FROM(2nd(s(2nd(cons(y0, y1))))) -> c2(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__FROM(2nd(s(from(2nd(from(y0)))))) -> c2(MARK(2nd(s(from(2nd(from(y0)))))))
   A__FROM(2nd(s(from(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(from(2nd(s(y0)))))) -> c2(MARK(2nd(s(from(2nd(s(y0)))))))
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   A__FROM(2nd(s(from(from(2nd(y0)))))) -> c2(MARK(2nd(s(from(from(2nd(y0)))))))
   A__FROM(2nd(s(from(from(from(y0)))))) -> c2(MARK(2nd(s(from(from(from(y0)))))))
   A__FROM(2nd(s(from(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__FROM(2nd(s(from(from(s(y0)))))) -> c2(MARK(2nd(s(from(from(s(y0)))))))
   A__FROM(2nd(s(cons(cons(y0, y1), y2)))) -> c2(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__FROM(2nd(s(cons(s(y0), y1)))) -> c2(MARK(2nd(s(cons(s(y0), y1)))))
   A__FROM(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(2nd(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
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   A__FROM(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
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   A__FROM(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(from(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__FROM(2nd(2nd(2nd(2nd(y0))))) -> c2(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__FROM(2nd(2nd(2nd(from(y0))))) -> c2(MARK(2nd(2nd(2nd(from(y0))))))
   A__FROM(2nd(2nd(2nd(cons(y0, y1))))) -> c2(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__FROM(2nd(2nd(2nd(s(y0))))) -> c2(MARK(2nd(2nd(2nd(s(y0))))))
   A__FROM(2nd(2nd(from(2nd(y0))))) -> c2(MARK(2nd(2nd(from(2nd(y0))))))
   A__FROM(2nd(2nd(from(from(y0))))) -> c2(MARK(2nd(2nd(from(from(y0))))))
   A__FROM(2nd(2nd(from(cons(y0, y1))))) -> c2(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__FROM(2nd(2nd(from(s(y0))))) -> c2(MARK(2nd(2nd(from(s(y0))))))
   A__FROM(2nd(2nd(s(s(y0))))) -> c2(MARK(2nd(2nd(s(s(y0))))))
   A__FROM(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(2nd(s(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__FROM(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__FROM(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__FROM(2nd(2nd(s(from(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(from(s(y0)))))) -> c2(MARK(2nd(2nd(s(from(s(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(from(from(y0)))))) -> c2(MARK(2nd(2nd(s(from(from(y0)))))))
   A__FROM(2nd(2nd(s(from(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__FROM(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__FROM(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c2(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__FROM(2nd(2nd(s(cons(s(y0), y1))))) -> c2(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__FROM(2nd(from(2nd(2nd(y0))))) -> c2(MARK(2nd(from(2nd(2nd(y0))))))
   A__FROM(2nd(from(2nd(from(y0))))) -> c2(MARK(2nd(from(2nd(from(y0))))))
   A__FROM(2nd(from(2nd(cons(y0, y1))))) -> c2(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__FROM(2nd(from(2nd(s(y0))))) -> c2(MARK(2nd(from(2nd(s(y0))))))
   A__FROM(2nd(from(from(2nd(y0))))) -> c2(MARK(2nd(from(from(2nd(y0))))))
   A__FROM(2nd(from(from(from(y0))))) -> c2(MARK(2nd(from(from(from(y0))))))
   A__FROM(2nd(from(from(cons(y0, y1))))) -> c2(MARK(2nd(from(from(cons(y0, y1))))))
   A__FROM(2nd(from(from(s(y0))))) -> c2(MARK(2nd(from(from(s(y0))))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1)))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
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   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
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   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
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   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
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   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
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   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
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   MARK(from(s(from(z0)))) -> c5(A__FROM(s(a__from(mark(z0)))), MARK(s(from(z0))))
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   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__FROM(2nd(s(from(2nd(from(y0)))))) -> c2(MARK(2nd(s(from(2nd(from(y0)))))))
   A__FROM(2nd(s(from(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(from(2nd(s(y0)))))) -> c2(MARK(2nd(s(from(2nd(s(y0)))))))
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   A__FROM(2nd(s(from(from(2nd(y0)))))) -> c2(MARK(2nd(s(from(from(2nd(y0)))))))
   A__FROM(2nd(s(from(from(from(y0)))))) -> c2(MARK(2nd(s(from(from(from(y0)))))))
   A__FROM(2nd(s(from(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__FROM(2nd(s(from(from(s(y0)))))) -> c2(MARK(2nd(s(from(from(s(y0)))))))
   A__FROM(2nd(s(cons(cons(y0, y1), y2)))) -> c2(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__FROM(2nd(s(cons(s(y0), y1)))) -> c2(MARK(2nd(s(cons(s(y0), y1)))))
   A__FROM(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
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   A__FROM(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(from(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__FROM(2nd(2nd(2nd(2nd(y0))))) -> c2(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__FROM(2nd(2nd(2nd(from(y0))))) -> c2(MARK(2nd(2nd(2nd(from(y0))))))
   A__FROM(2nd(2nd(2nd(cons(y0, y1))))) -> c2(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__FROM(2nd(2nd(2nd(s(y0))))) -> c2(MARK(2nd(2nd(2nd(s(y0))))))
   A__FROM(2nd(2nd(from(2nd(y0))))) -> c2(MARK(2nd(2nd(from(2nd(y0))))))
   A__FROM(2nd(2nd(from(from(y0))))) -> c2(MARK(2nd(2nd(from(from(y0))))))
   A__FROM(2nd(2nd(from(cons(y0, y1))))) -> c2(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__FROM(2nd(2nd(from(s(y0))))) -> c2(MARK(2nd(2nd(from(s(y0))))))
   A__FROM(2nd(2nd(s(s(y0))))) -> c2(MARK(2nd(2nd(s(s(y0))))))
   A__FROM(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(2nd(s(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__FROM(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__FROM(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__FROM(2nd(2nd(s(from(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(from(s(y0)))))) -> c2(MARK(2nd(2nd(s(from(s(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(from(from(y0)))))) -> c2(MARK(2nd(2nd(s(from(from(y0)))))))
   A__FROM(2nd(2nd(s(from(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__FROM(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__FROM(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c2(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__FROM(2nd(2nd(s(cons(s(y0), y1))))) -> c2(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__FROM(2nd(from(2nd(2nd(y0))))) -> c2(MARK(2nd(from(2nd(2nd(y0))))))
   A__FROM(2nd(from(2nd(from(y0))))) -> c2(MARK(2nd(from(2nd(from(y0))))))
   A__FROM(2nd(from(2nd(cons(y0, y1))))) -> c2(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__FROM(2nd(from(2nd(s(y0))))) -> c2(MARK(2nd(from(2nd(s(y0))))))
   A__FROM(2nd(from(from(2nd(y0))))) -> c2(MARK(2nd(from(from(2nd(y0))))))
   A__FROM(2nd(from(from(from(y0))))) -> c2(MARK(2nd(from(from(from(y0))))))
   A__FROM(2nd(from(from(cons(y0, y1))))) -> c2(MARK(2nd(from(from(cons(y0, y1))))))
   A__FROM(2nd(from(from(s(y0))))) -> c2(MARK(2nd(from(from(s(y0))))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(127) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(cons(cons(y0, y1), z1)) -> c6(MARK(cons(y0, y1))) by 
   MARK(cons(cons(cons(y0, y1), z1), z2)) -> c6(MARK(cons(cons(y0, y1), z1)))
   MARK(cons(cons(s(y0), z1), z2)) -> c6(MARK(cons(s(y0), z1)))
   MARK(cons(cons(2nd(cons(y0, y1)), z1), z2)) -> c6(MARK(cons(2nd(cons(y0, y1)), z1)))
   MARK(cons(cons(2nd(s(y0)), z1), z2)) -> c6(MARK(cons(2nd(s(y0)), z1)))
   MARK(cons(cons(2nd(2nd(2nd(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   MARK(cons(cons(2nd(2nd(from(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(from(y0))), z1)))
   MARK(cons(cons(2nd(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(2nd(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(s(y0))), z1)))
   MARK(cons(cons(2nd(2nd(y0)), z1), z2)) -> c6(MARK(cons(2nd(2nd(y0)), z1)))
   MARK(cons(cons(2nd(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(2nd(y0))), z1)))
   MARK(cons(cons(2nd(from(from(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(from(y0))), z1)))
   MARK(cons(cons(2nd(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   MARK(cons(cons(2nd(from(s(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(s(y0))), z1)))
   MARK(cons(cons(2nd(from(y0)), z1), z2)) -> c6(MARK(cons(2nd(from(y0)), z1)))
   MARK(cons(cons(from(cons(y0, y1)), z1), z2)) -> c6(MARK(cons(from(cons(y0, y1)), z1)))
   MARK(cons(cons(from(s(y0)), z1), z2)) -> c6(MARK(cons(from(s(y0)), z1)))
   MARK(cons(cons(from(2nd(y0)), z1), z2)) -> c6(MARK(cons(from(2nd(y0)), z1)))
   MARK(cons(cons(from(2nd(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(2nd(y0))), z1)))
   MARK(cons(cons(from(2nd(from(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(from(y0))), z1)))
   MARK(cons(cons(from(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(from(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(s(y0))), z1)))
   MARK(cons(cons(from(from(y0)), z1), z2)) -> c6(MARK(cons(from(from(y0)), z1)))
   MARK(cons(cons(from(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(from(2nd(y0))), z1)))
   MARK(cons(cons(from(from(from(y0))), z1), z2)) -> c6(MARK(cons(from(from(from(y0))), z1)))
   MARK(cons(cons(from(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(from(cons(y0, y1))), z1)))
   MARK(cons(cons(from(from(s(y0))), z1), z2)) -> c6(MARK(cons(from(from(s(y0))), z1)))

----------------------------------------

(128)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(s(y0), z1)) -> c6(MARK(s(y0)))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
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   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(from(s(2nd(z0)))) -> c5(A__FROM(s(a__2nd(mark(z0)))), MARK(s(2nd(z0))))
   MARK(from(s(from(z0)))) -> c5(A__FROM(s(a__from(mark(z0)))), MARK(s(from(z0))))
   MARK(from(s(cons(z0, z1)))) -> c5(A__FROM(s(cons(mark(z0), z1))), MARK(s(cons(z0, z1))))
   MARK(from(s(s(z0)))) -> c5(A__FROM(s(s(mark(z0)))), MARK(s(s(z0))))
   A__FROM(2nd(s(s(y0)))) -> c2(MARK(2nd(s(s(y0)))))
   A__FROM(2nd(s(2nd(cons(y0, y1))))) -> c2(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__FROM(2nd(s(from(2nd(from(y0)))))) -> c2(MARK(2nd(s(from(2nd(from(y0)))))))
   A__FROM(2nd(s(from(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(from(2nd(s(y0)))))) -> c2(MARK(2nd(s(from(2nd(s(y0)))))))
   A__FROM(2nd(s(from(from(y0))))) -> c2(MARK(2nd(s(from(from(y0))))))
   A__FROM(2nd(s(from(from(2nd(y0)))))) -> c2(MARK(2nd(s(from(from(2nd(y0)))))))
   A__FROM(2nd(s(from(from(from(y0)))))) -> c2(MARK(2nd(s(from(from(from(y0)))))))
   A__FROM(2nd(s(from(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__FROM(2nd(s(from(from(s(y0)))))) -> c2(MARK(2nd(s(from(from(s(y0)))))))
   A__FROM(2nd(s(cons(cons(y0, y1), y2)))) -> c2(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__FROM(2nd(s(cons(s(y0), y1)))) -> c2(MARK(2nd(s(cons(s(y0), y1)))))
   A__FROM(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(2nd(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__FROM(2nd(s(cons(2nd(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(from(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__FROM(2nd(2nd(2nd(2nd(y0))))) -> c2(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__FROM(2nd(2nd(2nd(from(y0))))) -> c2(MARK(2nd(2nd(2nd(from(y0))))))
   A__FROM(2nd(2nd(2nd(cons(y0, y1))))) -> c2(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__FROM(2nd(2nd(2nd(s(y0))))) -> c2(MARK(2nd(2nd(2nd(s(y0))))))
   A__FROM(2nd(2nd(from(2nd(y0))))) -> c2(MARK(2nd(2nd(from(2nd(y0))))))
   A__FROM(2nd(2nd(from(from(y0))))) -> c2(MARK(2nd(2nd(from(from(y0))))))
   A__FROM(2nd(2nd(from(cons(y0, y1))))) -> c2(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__FROM(2nd(2nd(from(s(y0))))) -> c2(MARK(2nd(2nd(from(s(y0))))))
   A__FROM(2nd(2nd(s(s(y0))))) -> c2(MARK(2nd(2nd(s(s(y0))))))
   A__FROM(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(2nd(s(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__FROM(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__FROM(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__FROM(2nd(2nd(s(from(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(from(s(y0)))))) -> c2(MARK(2nd(2nd(s(from(s(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(from(from(y0)))))) -> c2(MARK(2nd(2nd(s(from(from(y0)))))))
   A__FROM(2nd(2nd(s(from(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__FROM(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__FROM(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c2(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__FROM(2nd(2nd(s(cons(s(y0), y1))))) -> c2(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__FROM(2nd(from(2nd(2nd(y0))))) -> c2(MARK(2nd(from(2nd(2nd(y0))))))
   A__FROM(2nd(from(2nd(from(y0))))) -> c2(MARK(2nd(from(2nd(from(y0))))))
   A__FROM(2nd(from(2nd(cons(y0, y1))))) -> c2(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__FROM(2nd(from(2nd(s(y0))))) -> c2(MARK(2nd(from(2nd(s(y0))))))
   A__FROM(2nd(from(from(2nd(y0))))) -> c2(MARK(2nd(from(from(2nd(y0))))))
   A__FROM(2nd(from(from(from(y0))))) -> c2(MARK(2nd(from(from(from(y0))))))
   A__FROM(2nd(from(from(cons(y0, y1))))) -> c2(MARK(2nd(from(from(cons(y0, y1))))))
   A__FROM(2nd(from(from(s(y0))))) -> c2(MARK(2nd(from(from(s(y0))))))
   MARK(cons(cons(cons(y0, y1), z1), z2)) -> c6(MARK(cons(cons(y0, y1), z1)))
   MARK(cons(cons(s(y0), z1), z2)) -> c6(MARK(cons(s(y0), z1)))
   MARK(cons(cons(2nd(cons(y0, y1)), z1), z2)) -> c6(MARK(cons(2nd(cons(y0, y1)), z1)))
   MARK(cons(cons(2nd(s(y0)), z1), z2)) -> c6(MARK(cons(2nd(s(y0)), z1)))
   MARK(cons(cons(2nd(2nd(2nd(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   MARK(cons(cons(2nd(2nd(from(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(from(y0))), z1)))
   MARK(cons(cons(2nd(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(2nd(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(s(y0))), z1)))
   MARK(cons(cons(2nd(2nd(y0)), z1), z2)) -> c6(MARK(cons(2nd(2nd(y0)), z1)))
   MARK(cons(cons(2nd(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(2nd(y0))), z1)))
   MARK(cons(cons(2nd(from(from(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(from(y0))), z1)))
   MARK(cons(cons(2nd(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   MARK(cons(cons(2nd(from(s(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(s(y0))), z1)))
   MARK(cons(cons(2nd(from(y0)), z1), z2)) -> c6(MARK(cons(2nd(from(y0)), z1)))
   MARK(cons(cons(from(cons(y0, y1)), z1), z2)) -> c6(MARK(cons(from(cons(y0, y1)), z1)))
   MARK(cons(cons(from(s(y0)), z1), z2)) -> c6(MARK(cons(from(s(y0)), z1)))
   MARK(cons(cons(from(2nd(y0)), z1), z2)) -> c6(MARK(cons(from(2nd(y0)), z1)))
   MARK(cons(cons(from(2nd(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(2nd(y0))), z1)))
   MARK(cons(cons(from(2nd(from(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(from(y0))), z1)))
   MARK(cons(cons(from(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(from(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(s(y0))), z1)))
   MARK(cons(cons(from(from(y0)), z1), z2)) -> c6(MARK(cons(from(from(y0)), z1)))
   MARK(cons(cons(from(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(from(2nd(y0))), z1)))
   MARK(cons(cons(from(from(from(y0))), z1), z2)) -> c6(MARK(cons(from(from(from(y0))), z1)))
   MARK(cons(cons(from(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(from(cons(y0, y1))), z1)))
   MARK(cons(cons(from(from(s(y0))), z1), z2)) -> c6(MARK(cons(from(from(s(y0))), z1)))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
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   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
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   MARK(cons(cons(2nd(cons(y0, y1)), z1), z2)) -> c6(MARK(cons(2nd(cons(y0, y1)), z1)))
   MARK(cons(cons(2nd(s(y0)), z1), z2)) -> c6(MARK(cons(2nd(s(y0)), z1)))
   MARK(cons(cons(2nd(2nd(2nd(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   MARK(cons(cons(2nd(2nd(from(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(from(y0))), z1)))
   MARK(cons(cons(2nd(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(2nd(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(s(y0))), z1)))
   MARK(cons(cons(2nd(2nd(y0)), z1), z2)) -> c6(MARK(cons(2nd(2nd(y0)), z1)))
   MARK(cons(cons(2nd(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(2nd(y0))), z1)))
   MARK(cons(cons(2nd(from(from(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(from(y0))), z1)))
   MARK(cons(cons(2nd(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   MARK(cons(cons(2nd(from(s(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(s(y0))), z1)))
   MARK(cons(cons(2nd(from(y0)), z1), z2)) -> c6(MARK(cons(2nd(from(y0)), z1)))
   MARK(cons(cons(from(cons(y0, y1)), z1), z2)) -> c6(MARK(cons(from(cons(y0, y1)), z1)))
   MARK(cons(cons(from(s(y0)), z1), z2)) -> c6(MARK(cons(from(s(y0)), z1)))
   MARK(cons(cons(from(2nd(y0)), z1), z2)) -> c6(MARK(cons(from(2nd(y0)), z1)))
   MARK(cons(cons(from(2nd(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(2nd(y0))), z1)))
   MARK(cons(cons(from(2nd(from(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(from(y0))), z1)))
   MARK(cons(cons(from(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(from(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(s(y0))), z1)))
   MARK(cons(cons(from(from(y0)), z1), z2)) -> c6(MARK(cons(from(from(y0)), z1)))
   MARK(cons(cons(from(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(from(2nd(y0))), z1)))
   MARK(cons(cons(from(from(from(y0))), z1), z2)) -> c6(MARK(cons(from(from(from(y0))), z1)))
   MARK(cons(cons(from(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(from(cons(y0, y1))), z1)))
   MARK(cons(cons(from(from(s(y0))), z1), z2)) -> c6(MARK(cons(from(from(s(y0))), z1)))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(129) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(cons(s(y0), z1)) -> c6(MARK(s(y0))) by 
   MARK(cons(s(s(y0)), z1)) -> c6(MARK(s(s(y0))))
   MARK(cons(s(2nd(cons(y0, y1))), z1)) -> c6(MARK(s(2nd(cons(y0, y1)))))
   MARK(cons(s(2nd(s(y0))), z1)) -> c6(MARK(s(2nd(s(y0)))))
   MARK(cons(s(2nd(2nd(2nd(y0)))), z1)) -> c6(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(cons(s(2nd(2nd(from(y0)))), z1)) -> c6(MARK(s(2nd(2nd(from(y0))))))
   MARK(cons(s(2nd(2nd(cons(y0, y1)))), z1)) -> c6(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(cons(s(2nd(2nd(s(y0)))), z1)) -> c6(MARK(s(2nd(2nd(s(y0))))))
   MARK(cons(s(2nd(2nd(y0))), z1)) -> c6(MARK(s(2nd(2nd(y0)))))
   MARK(cons(s(2nd(from(2nd(y0)))), z1)) -> c6(MARK(s(2nd(from(2nd(y0))))))
   MARK(cons(s(2nd(from(from(y0)))), z1)) -> c6(MARK(s(2nd(from(from(y0))))))
   MARK(cons(s(2nd(from(cons(y0, y1)))), z1)) -> c6(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(cons(s(2nd(from(s(y0)))), z1)) -> c6(MARK(s(2nd(from(s(y0))))))
   MARK(cons(s(2nd(from(y0))), z1)) -> c6(MARK(s(2nd(from(y0)))))
   MARK(cons(s(from(cons(y0, y1))), z1)) -> c6(MARK(s(from(cons(y0, y1)))))
   MARK(cons(s(from(s(y0))), z1)) -> c6(MARK(s(from(s(y0)))))
   MARK(cons(s(from(2nd(y0))), z1)) -> c6(MARK(s(from(2nd(y0)))))
   MARK(cons(s(from(2nd(2nd(y0)))), z1)) -> c6(MARK(s(from(2nd(2nd(y0))))))
   MARK(cons(s(from(2nd(from(y0)))), z1)) -> c6(MARK(s(from(2nd(from(y0))))))
   MARK(cons(s(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(cons(s(from(2nd(s(y0)))), z1)) -> c6(MARK(s(from(2nd(s(y0))))))
   MARK(cons(s(from(from(y0))), z1)) -> c6(MARK(s(from(from(y0)))))
   MARK(cons(s(from(from(2nd(y0)))), z1)) -> c6(MARK(s(from(from(2nd(y0))))))
   MARK(cons(s(from(from(from(y0)))), z1)) -> c6(MARK(s(from(from(from(y0))))))
   MARK(cons(s(from(from(cons(y0, y1)))), z1)) -> c6(MARK(s(from(from(cons(y0, y1))))))
   MARK(cons(s(from(from(s(y0)))), z1)) -> c6(MARK(s(from(from(s(y0))))))
   MARK(cons(s(cons(cons(y0, y1), y2)), z1)) -> c6(MARK(s(cons(cons(y0, y1), y2))))
   MARK(cons(s(cons(s(y0), y1)), z1)) -> c6(MARK(s(cons(s(y0), y1))))
   MARK(cons(s(cons(2nd(cons(y0, y1)), y2)), z1)) -> c6(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(cons(s(cons(2nd(s(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(cons(s(cons(2nd(2nd(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(from(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(cons(s(cons(2nd(2nd(s(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(cons(s(cons(2nd(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(cons(s(cons(2nd(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(cons(s(cons(2nd(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(2nd(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(cons(s(cons(2nd(from(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(cons(s(cons(from(cons(y0, y1)), y2)), z1)) -> c6(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(cons(s(cons(from(s(y0)), y1)), z1)) -> c6(MARK(s(cons(from(s(y0)), y1))))
   MARK(cons(s(cons(from(2nd(y0)), y1)), z1)) -> c6(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(cons(s(cons(from(2nd(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(cons(s(cons(from(2nd(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(cons(s(cons(from(2nd(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(2nd(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(cons(s(cons(from(from(y0)), y1)), z1)) -> c6(MARK(s(cons(from(from(y0)), y1))))
   MARK(cons(s(cons(from(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(cons(s(cons(from(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(cons(s(cons(from(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(s(y0))), y1))))

----------------------------------------

(130)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
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   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
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   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
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   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
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   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
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   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
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   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
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   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__FROM(2nd(s(from(2nd(from(y0)))))) -> c2(MARK(2nd(s(from(2nd(from(y0)))))))
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   A__FROM(2nd(s(from(from(2nd(y0)))))) -> c2(MARK(2nd(s(from(from(2nd(y0)))))))
   A__FROM(2nd(s(from(from(from(y0)))))) -> c2(MARK(2nd(s(from(from(from(y0)))))))
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   A__FROM(2nd(s(from(from(s(y0)))))) -> c2(MARK(2nd(s(from(from(s(y0)))))))
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   A__FROM(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
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   A__FROM(2nd(s(cons(2nd(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__FROM(2nd(s(cons(from(s(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__FROM(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__FROM(2nd(s(cons(from(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__FROM(2nd(2nd(2nd(2nd(y0))))) -> c2(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__FROM(2nd(2nd(2nd(from(y0))))) -> c2(MARK(2nd(2nd(2nd(from(y0))))))
   A__FROM(2nd(2nd(2nd(cons(y0, y1))))) -> c2(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__FROM(2nd(2nd(2nd(s(y0))))) -> c2(MARK(2nd(2nd(2nd(s(y0))))))
   A__FROM(2nd(2nd(from(2nd(y0))))) -> c2(MARK(2nd(2nd(from(2nd(y0))))))
   A__FROM(2nd(2nd(from(from(y0))))) -> c2(MARK(2nd(2nd(from(from(y0))))))
   A__FROM(2nd(2nd(from(cons(y0, y1))))) -> c2(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__FROM(2nd(2nd(from(s(y0))))) -> c2(MARK(2nd(2nd(from(s(y0))))))
   A__FROM(2nd(2nd(s(s(y0))))) -> c2(MARK(2nd(2nd(s(s(y0))))))
   A__FROM(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(2nd(s(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__FROM(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__FROM(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(2nd(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__FROM(2nd(2nd(s(2nd(from(y0)))))) -> c2(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__FROM(2nd(2nd(s(from(cons(y0, y1)))))) -> c2(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__FROM(2nd(2nd(s(from(s(y0)))))) -> c2(MARK(2nd(2nd(s(from(s(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(y0)))))) -> c2(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__FROM(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__FROM(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(2nd(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__FROM(2nd(2nd(s(from(from(y0)))))) -> c2(MARK(2nd(2nd(s(from(from(y0)))))))
   A__FROM(2nd(2nd(s(from(from(2nd(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__FROM(2nd(2nd(s(from(from(from(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__FROM(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c2(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__FROM(2nd(2nd(s(from(from(s(y0))))))) -> c2(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__FROM(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c2(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__FROM(2nd(2nd(s(cons(s(y0), y1))))) -> c2(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__FROM(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__FROM(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c2(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__FROM(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c2(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__FROM(2nd(from(2nd(2nd(y0))))) -> c2(MARK(2nd(from(2nd(2nd(y0))))))
   A__FROM(2nd(from(2nd(from(y0))))) -> c2(MARK(2nd(from(2nd(from(y0))))))
   A__FROM(2nd(from(2nd(cons(y0, y1))))) -> c2(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__FROM(2nd(from(2nd(s(y0))))) -> c2(MARK(2nd(from(2nd(s(y0))))))
   A__FROM(2nd(from(from(2nd(y0))))) -> c2(MARK(2nd(from(from(2nd(y0))))))
   A__FROM(2nd(from(from(from(y0))))) -> c2(MARK(2nd(from(from(from(y0))))))
   A__FROM(2nd(from(from(cons(y0, y1))))) -> c2(MARK(2nd(from(from(cons(y0, y1))))))
   A__FROM(2nd(from(from(s(y0))))) -> c2(MARK(2nd(from(from(s(y0))))))
   MARK(cons(cons(cons(y0, y1), z1), z2)) -> c6(MARK(cons(cons(y0, y1), z1)))
   MARK(cons(cons(s(y0), z1), z2)) -> c6(MARK(cons(s(y0), z1)))
   MARK(cons(cons(2nd(cons(y0, y1)), z1), z2)) -> c6(MARK(cons(2nd(cons(y0, y1)), z1)))
   MARK(cons(cons(2nd(s(y0)), z1), z2)) -> c6(MARK(cons(2nd(s(y0)), z1)))
   MARK(cons(cons(2nd(2nd(2nd(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   MARK(cons(cons(2nd(2nd(from(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(from(y0))), z1)))
   MARK(cons(cons(2nd(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(2nd(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(s(y0))), z1)))
   MARK(cons(cons(2nd(2nd(y0)), z1), z2)) -> c6(MARK(cons(2nd(2nd(y0)), z1)))
   MARK(cons(cons(2nd(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(2nd(y0))), z1)))
   MARK(cons(cons(2nd(from(from(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(from(y0))), z1)))
   MARK(cons(cons(2nd(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   MARK(cons(cons(2nd(from(s(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(s(y0))), z1)))
   MARK(cons(cons(2nd(from(y0)), z1), z2)) -> c6(MARK(cons(2nd(from(y0)), z1)))
   MARK(cons(cons(from(cons(y0, y1)), z1), z2)) -> c6(MARK(cons(from(cons(y0, y1)), z1)))
   MARK(cons(cons(from(s(y0)), z1), z2)) -> c6(MARK(cons(from(s(y0)), z1)))
   MARK(cons(cons(from(2nd(y0)), z1), z2)) -> c6(MARK(cons(from(2nd(y0)), z1)))
   MARK(cons(cons(from(2nd(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(2nd(y0))), z1)))
   MARK(cons(cons(from(2nd(from(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(from(y0))), z1)))
   MARK(cons(cons(from(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(from(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(s(y0))), z1)))
   MARK(cons(cons(from(from(y0)), z1), z2)) -> c6(MARK(cons(from(from(y0)), z1)))
   MARK(cons(cons(from(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(from(2nd(y0))), z1)))
   MARK(cons(cons(from(from(from(y0))), z1), z2)) -> c6(MARK(cons(from(from(from(y0))), z1)))
   MARK(cons(cons(from(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(from(cons(y0, y1))), z1)))
   MARK(cons(cons(from(from(s(y0))), z1), z2)) -> c6(MARK(cons(from(from(s(y0))), z1)))
   MARK(cons(s(s(y0)), z1)) -> c6(MARK(s(s(y0))))
   MARK(cons(s(2nd(cons(y0, y1))), z1)) -> c6(MARK(s(2nd(cons(y0, y1)))))
   MARK(cons(s(2nd(s(y0))), z1)) -> c6(MARK(s(2nd(s(y0)))))
   MARK(cons(s(2nd(2nd(2nd(y0)))), z1)) -> c6(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(cons(s(2nd(2nd(from(y0)))), z1)) -> c6(MARK(s(2nd(2nd(from(y0))))))
   MARK(cons(s(2nd(2nd(cons(y0, y1)))), z1)) -> c6(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(cons(s(2nd(2nd(s(y0)))), z1)) -> c6(MARK(s(2nd(2nd(s(y0))))))
   MARK(cons(s(2nd(2nd(y0))), z1)) -> c6(MARK(s(2nd(2nd(y0)))))
   MARK(cons(s(2nd(from(2nd(y0)))), z1)) -> c6(MARK(s(2nd(from(2nd(y0))))))
   MARK(cons(s(2nd(from(from(y0)))), z1)) -> c6(MARK(s(2nd(from(from(y0))))))
   MARK(cons(s(2nd(from(cons(y0, y1)))), z1)) -> c6(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(cons(s(2nd(from(s(y0)))), z1)) -> c6(MARK(s(2nd(from(s(y0))))))
   MARK(cons(s(2nd(from(y0))), z1)) -> c6(MARK(s(2nd(from(y0)))))
   MARK(cons(s(from(cons(y0, y1))), z1)) -> c6(MARK(s(from(cons(y0, y1)))))
   MARK(cons(s(from(s(y0))), z1)) -> c6(MARK(s(from(s(y0)))))
   MARK(cons(s(from(2nd(y0))), z1)) -> c6(MARK(s(from(2nd(y0)))))
   MARK(cons(s(from(2nd(2nd(y0)))), z1)) -> c6(MARK(s(from(2nd(2nd(y0))))))
   MARK(cons(s(from(2nd(from(y0)))), z1)) -> c6(MARK(s(from(2nd(from(y0))))))
   MARK(cons(s(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(cons(s(from(2nd(s(y0)))), z1)) -> c6(MARK(s(from(2nd(s(y0))))))
   MARK(cons(s(from(from(y0))), z1)) -> c6(MARK(s(from(from(y0)))))
   MARK(cons(s(from(from(2nd(y0)))), z1)) -> c6(MARK(s(from(from(2nd(y0))))))
   MARK(cons(s(from(from(from(y0)))), z1)) -> c6(MARK(s(from(from(from(y0))))))
   MARK(cons(s(from(from(cons(y0, y1)))), z1)) -> c6(MARK(s(from(from(cons(y0, y1))))))
   MARK(cons(s(from(from(s(y0)))), z1)) -> c6(MARK(s(from(from(s(y0))))))
   MARK(cons(s(cons(cons(y0, y1), y2)), z1)) -> c6(MARK(s(cons(cons(y0, y1), y2))))
   MARK(cons(s(cons(s(y0), y1)), z1)) -> c6(MARK(s(cons(s(y0), y1))))
   MARK(cons(s(cons(2nd(cons(y0, y1)), y2)), z1)) -> c6(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(cons(s(cons(2nd(s(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(cons(s(cons(2nd(2nd(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(from(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(cons(s(cons(2nd(2nd(s(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(cons(s(cons(2nd(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(cons(s(cons(2nd(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(cons(s(cons(2nd(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(2nd(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(cons(s(cons(2nd(from(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(cons(s(cons(from(cons(y0, y1)), y2)), z1)) -> c6(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(cons(s(cons(from(s(y0)), y1)), z1)) -> c6(MARK(s(cons(from(s(y0)), y1))))
   MARK(cons(s(cons(from(2nd(y0)), y1)), z1)) -> c6(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(cons(s(cons(from(2nd(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(cons(s(cons(from(2nd(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(cons(s(cons(from(2nd(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(2nd(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(cons(s(cons(from(from(y0)), y1)), z1)) -> c6(MARK(s(cons(from(from(y0)), y1))))
   MARK(cons(s(cons(from(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(cons(s(cons(from(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(cons(s(cons(from(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(s(y0))), y1))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
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   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
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   A__FROM(2nd(from(from(from(y0))))) -> c2(MARK(2nd(from(from(from(y0))))))
   A__FROM(2nd(from(from(cons(y0, y1))))) -> c2(MARK(2nd(from(from(cons(y0, y1))))))
   A__FROM(2nd(from(from(s(y0))))) -> c2(MARK(2nd(from(from(s(y0))))))
   MARK(cons(cons(cons(y0, y1), z1), z2)) -> c6(MARK(cons(cons(y0, y1), z1)))
   MARK(cons(cons(s(y0), z1), z2)) -> c6(MARK(cons(s(y0), z1)))
   MARK(cons(cons(2nd(cons(y0, y1)), z1), z2)) -> c6(MARK(cons(2nd(cons(y0, y1)), z1)))
   MARK(cons(cons(2nd(s(y0)), z1), z2)) -> c6(MARK(cons(2nd(s(y0)), z1)))
   MARK(cons(cons(2nd(2nd(2nd(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   MARK(cons(cons(2nd(2nd(from(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(from(y0))), z1)))
   MARK(cons(cons(2nd(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(2nd(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(2nd(2nd(s(y0))), z1)))
   MARK(cons(cons(2nd(2nd(y0)), z1), z2)) -> c6(MARK(cons(2nd(2nd(y0)), z1)))
   MARK(cons(cons(2nd(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(2nd(y0))), z1)))
   MARK(cons(cons(2nd(from(from(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(from(y0))), z1)))
   MARK(cons(cons(2nd(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   MARK(cons(cons(2nd(from(s(y0))), z1), z2)) -> c6(MARK(cons(2nd(from(s(y0))), z1)))
   MARK(cons(cons(2nd(from(y0)), z1), z2)) -> c6(MARK(cons(2nd(from(y0)), z1)))
   MARK(cons(cons(from(cons(y0, y1)), z1), z2)) -> c6(MARK(cons(from(cons(y0, y1)), z1)))
   MARK(cons(cons(from(s(y0)), z1), z2)) -> c6(MARK(cons(from(s(y0)), z1)))
   MARK(cons(cons(from(2nd(y0)), z1), z2)) -> c6(MARK(cons(from(2nd(y0)), z1)))
   MARK(cons(cons(from(2nd(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(2nd(y0))), z1)))
   MARK(cons(cons(from(2nd(from(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(from(y0))), z1)))
   MARK(cons(cons(from(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(from(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(s(y0))), z1)))
   MARK(cons(cons(from(from(y0)), z1), z2)) -> c6(MARK(cons(from(from(y0)), z1)))
   MARK(cons(cons(from(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(from(2nd(y0))), z1)))
   MARK(cons(cons(from(from(from(y0))), z1), z2)) -> c6(MARK(cons(from(from(from(y0))), z1)))
   MARK(cons(cons(from(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(from(cons(y0, y1))), z1)))
   MARK(cons(cons(from(from(s(y0))), z1), z2)) -> c6(MARK(cons(from(from(s(y0))), z1)))
   MARK(cons(s(s(y0)), z1)) -> c6(MARK(s(s(y0))))
   MARK(cons(s(2nd(cons(y0, y1))), z1)) -> c6(MARK(s(2nd(cons(y0, y1)))))
   MARK(cons(s(2nd(s(y0))), z1)) -> c6(MARK(s(2nd(s(y0)))))
   MARK(cons(s(2nd(2nd(2nd(y0)))), z1)) -> c6(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(cons(s(2nd(2nd(from(y0)))), z1)) -> c6(MARK(s(2nd(2nd(from(y0))))))
   MARK(cons(s(2nd(2nd(cons(y0, y1)))), z1)) -> c6(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(cons(s(2nd(2nd(s(y0)))), z1)) -> c6(MARK(s(2nd(2nd(s(y0))))))
   MARK(cons(s(2nd(2nd(y0))), z1)) -> c6(MARK(s(2nd(2nd(y0)))))
   MARK(cons(s(2nd(from(2nd(y0)))), z1)) -> c6(MARK(s(2nd(from(2nd(y0))))))
   MARK(cons(s(2nd(from(from(y0)))), z1)) -> c6(MARK(s(2nd(from(from(y0))))))
   MARK(cons(s(2nd(from(cons(y0, y1)))), z1)) -> c6(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(cons(s(2nd(from(s(y0)))), z1)) -> c6(MARK(s(2nd(from(s(y0))))))
   MARK(cons(s(2nd(from(y0))), z1)) -> c6(MARK(s(2nd(from(y0)))))
   MARK(cons(s(from(cons(y0, y1))), z1)) -> c6(MARK(s(from(cons(y0, y1)))))
   MARK(cons(s(from(s(y0))), z1)) -> c6(MARK(s(from(s(y0)))))
   MARK(cons(s(from(2nd(y0))), z1)) -> c6(MARK(s(from(2nd(y0)))))
   MARK(cons(s(from(2nd(2nd(y0)))), z1)) -> c6(MARK(s(from(2nd(2nd(y0))))))
   MARK(cons(s(from(2nd(from(y0)))), z1)) -> c6(MARK(s(from(2nd(from(y0))))))
   MARK(cons(s(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(cons(s(from(2nd(s(y0)))), z1)) -> c6(MARK(s(from(2nd(s(y0))))))
   MARK(cons(s(from(from(y0))), z1)) -> c6(MARK(s(from(from(y0)))))
   MARK(cons(s(from(from(2nd(y0)))), z1)) -> c6(MARK(s(from(from(2nd(y0))))))
   MARK(cons(s(from(from(from(y0)))), z1)) -> c6(MARK(s(from(from(from(y0))))))
   MARK(cons(s(from(from(cons(y0, y1)))), z1)) -> c6(MARK(s(from(from(cons(y0, y1))))))
   MARK(cons(s(from(from(s(y0)))), z1)) -> c6(MARK(s(from(from(s(y0))))))
   MARK(cons(s(cons(cons(y0, y1), y2)), z1)) -> c6(MARK(s(cons(cons(y0, y1), y2))))
   MARK(cons(s(cons(s(y0), y1)), z1)) -> c6(MARK(s(cons(s(y0), y1))))
   MARK(cons(s(cons(2nd(cons(y0, y1)), y2)), z1)) -> c6(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(cons(s(cons(2nd(s(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(cons(s(cons(2nd(2nd(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(from(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(cons(s(cons(2nd(2nd(s(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(cons(s(cons(2nd(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(cons(s(cons(2nd(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(cons(s(cons(2nd(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(2nd(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(cons(s(cons(2nd(from(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(cons(s(cons(from(cons(y0, y1)), y2)), z1)) -> c6(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(cons(s(cons(from(s(y0)), y1)), z1)) -> c6(MARK(s(cons(from(s(y0)), y1))))
   MARK(cons(s(cons(from(2nd(y0)), y1)), z1)) -> c6(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(cons(s(cons(from(2nd(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(cons(s(cons(from(2nd(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(cons(s(cons(from(2nd(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(2nd(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(cons(s(cons(from(from(y0)), y1)), z1)) -> c6(MARK(s(cons(from(from(y0)), y1))))
   MARK(cons(s(cons(from(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(cons(s(cons(from(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(cons(s(cons(from(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(s(y0))), y1))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(131) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(cons(2nd(s(y0)), z1)) -> c6(MARK(2nd(s(y0)))) by 
   MARK(cons(2nd(s(s(y0))), z1)) -> c6(MARK(2nd(s(s(y0)))))
   MARK(cons(2nd(s(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(cons(2nd(s(2nd(s(y0)))), z1)) -> c6(MARK(2nd(s(2nd(s(y0))))))
   MARK(cons(2nd(s(2nd(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(from(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(s(2nd(2nd(s(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(cons(2nd(s(2nd(from(2nd(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(cons(2nd(s(2nd(from(from(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(cons(2nd(s(2nd(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(cons(2nd(s(2nd(from(s(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(cons(2nd(s(2nd(from(y0)))), z1)) -> c6(MARK(2nd(s(2nd(from(y0))))))
   MARK(cons(2nd(s(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(cons(2nd(s(from(s(y0)))), z1)) -> c6(MARK(2nd(s(from(s(y0))))))
   MARK(cons(2nd(s(from(2nd(y0)))), z1)) -> c6(MARK(2nd(s(from(2nd(y0))))))
   MARK(cons(2nd(s(from(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(cons(2nd(s(from(2nd(from(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(cons(2nd(s(from(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(s(from(2nd(s(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(cons(2nd(s(from(from(y0)))), z1)) -> c6(MARK(2nd(s(from(from(y0))))))
   MARK(cons(2nd(s(from(from(2nd(y0))))), z1)) -> c6(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(cons(2nd(s(from(from(from(y0))))), z1)) -> c6(MARK(2nd(s(from(from(from(y0)))))))
   MARK(cons(2nd(s(from(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(cons(2nd(s(from(from(s(y0))))), z1)) -> c6(MARK(2nd(s(from(from(s(y0)))))))
   MARK(cons(2nd(s(cons(cons(y0, y1), y2))), z1)) -> c6(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(cons(2nd(s(cons(s(y0), y1))), z1)) -> c6(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(cons(2nd(s(cons(2nd(s(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(2nd(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(cons(y0, y1)), y2))), z1)) -> c6(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(cons(2nd(s(cons(from(s(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(2nd(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(s(y0))), y1)))))

----------------------------------------

(132)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
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   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
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   MARK(cons(cons(from(2nd(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   MARK(cons(cons(from(2nd(s(y0))), z1), z2)) -> c6(MARK(cons(from(2nd(s(y0))), z1)))
   MARK(cons(cons(from(from(y0)), z1), z2)) -> c6(MARK(cons(from(from(y0)), z1)))
   MARK(cons(cons(from(from(2nd(y0))), z1), z2)) -> c6(MARK(cons(from(from(2nd(y0))), z1)))
   MARK(cons(cons(from(from(from(y0))), z1), z2)) -> c6(MARK(cons(from(from(from(y0))), z1)))
   MARK(cons(cons(from(from(cons(y0, y1))), z1), z2)) -> c6(MARK(cons(from(from(cons(y0, y1))), z1)))
   MARK(cons(cons(from(from(s(y0))), z1), z2)) -> c6(MARK(cons(from(from(s(y0))), z1)))
   MARK(cons(s(s(y0)), z1)) -> c6(MARK(s(s(y0))))
   MARK(cons(s(2nd(cons(y0, y1))), z1)) -> c6(MARK(s(2nd(cons(y0, y1)))))
   MARK(cons(s(2nd(s(y0))), z1)) -> c6(MARK(s(2nd(s(y0)))))
   MARK(cons(s(2nd(2nd(2nd(y0)))), z1)) -> c6(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(cons(s(2nd(2nd(from(y0)))), z1)) -> c6(MARK(s(2nd(2nd(from(y0))))))
   MARK(cons(s(2nd(2nd(cons(y0, y1)))), z1)) -> c6(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(cons(s(2nd(2nd(s(y0)))), z1)) -> c6(MARK(s(2nd(2nd(s(y0))))))
   MARK(cons(s(2nd(2nd(y0))), z1)) -> c6(MARK(s(2nd(2nd(y0)))))
   MARK(cons(s(2nd(from(2nd(y0)))), z1)) -> c6(MARK(s(2nd(from(2nd(y0))))))
   MARK(cons(s(2nd(from(from(y0)))), z1)) -> c6(MARK(s(2nd(from(from(y0))))))
   MARK(cons(s(2nd(from(cons(y0, y1)))), z1)) -> c6(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(cons(s(2nd(from(s(y0)))), z1)) -> c6(MARK(s(2nd(from(s(y0))))))
   MARK(cons(s(2nd(from(y0))), z1)) -> c6(MARK(s(2nd(from(y0)))))
   MARK(cons(s(from(cons(y0, y1))), z1)) -> c6(MARK(s(from(cons(y0, y1)))))
   MARK(cons(s(from(s(y0))), z1)) -> c6(MARK(s(from(s(y0)))))
   MARK(cons(s(from(2nd(y0))), z1)) -> c6(MARK(s(from(2nd(y0)))))
   MARK(cons(s(from(2nd(2nd(y0)))), z1)) -> c6(MARK(s(from(2nd(2nd(y0))))))
   MARK(cons(s(from(2nd(from(y0)))), z1)) -> c6(MARK(s(from(2nd(from(y0))))))
   MARK(cons(s(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(cons(s(from(2nd(s(y0)))), z1)) -> c6(MARK(s(from(2nd(s(y0))))))
   MARK(cons(s(from(from(y0))), z1)) -> c6(MARK(s(from(from(y0)))))
   MARK(cons(s(from(from(2nd(y0)))), z1)) -> c6(MARK(s(from(from(2nd(y0))))))
   MARK(cons(s(from(from(from(y0)))), z1)) -> c6(MARK(s(from(from(from(y0))))))
   MARK(cons(s(from(from(cons(y0, y1)))), z1)) -> c6(MARK(s(from(from(cons(y0, y1))))))
   MARK(cons(s(from(from(s(y0)))), z1)) -> c6(MARK(s(from(from(s(y0))))))
   MARK(cons(s(cons(cons(y0, y1), y2)), z1)) -> c6(MARK(s(cons(cons(y0, y1), y2))))
   MARK(cons(s(cons(s(y0), y1)), z1)) -> c6(MARK(s(cons(s(y0), y1))))
   MARK(cons(s(cons(2nd(cons(y0, y1)), y2)), z1)) -> c6(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(cons(s(cons(2nd(s(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(cons(s(cons(2nd(2nd(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(from(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(cons(s(cons(2nd(2nd(s(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(cons(s(cons(2nd(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(cons(s(cons(2nd(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(cons(s(cons(2nd(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(2nd(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(cons(s(cons(2nd(from(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(cons(s(cons(from(cons(y0, y1)), y2)), z1)) -> c6(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(cons(s(cons(from(s(y0)), y1)), z1)) -> c6(MARK(s(cons(from(s(y0)), y1))))
   MARK(cons(s(cons(from(2nd(y0)), y1)), z1)) -> c6(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(cons(s(cons(from(2nd(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(cons(s(cons(from(2nd(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(cons(s(cons(from(2nd(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(2nd(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(cons(s(cons(from(from(y0)), y1)), z1)) -> c6(MARK(s(cons(from(from(y0)), y1))))
   MARK(cons(s(cons(from(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(cons(s(cons(from(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(cons(s(cons(from(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(cons(2nd(s(s(y0))), z1)) -> c6(MARK(2nd(s(s(y0)))))
   MARK(cons(2nd(s(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(cons(2nd(s(2nd(s(y0)))), z1)) -> c6(MARK(2nd(s(2nd(s(y0))))))
   MARK(cons(2nd(s(2nd(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(from(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(s(2nd(2nd(s(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(cons(2nd(s(2nd(from(2nd(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(cons(2nd(s(2nd(from(from(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(cons(2nd(s(2nd(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(cons(2nd(s(2nd(from(s(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(cons(2nd(s(2nd(from(y0)))), z1)) -> c6(MARK(2nd(s(2nd(from(y0))))))
   MARK(cons(2nd(s(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(cons(2nd(s(from(s(y0)))), z1)) -> c6(MARK(2nd(s(from(s(y0))))))
   MARK(cons(2nd(s(from(2nd(y0)))), z1)) -> c6(MARK(2nd(s(from(2nd(y0))))))
   MARK(cons(2nd(s(from(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(cons(2nd(s(from(2nd(from(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(cons(2nd(s(from(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(s(from(2nd(s(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(cons(2nd(s(from(from(y0)))), z1)) -> c6(MARK(2nd(s(from(from(y0))))))
   MARK(cons(2nd(s(from(from(2nd(y0))))), z1)) -> c6(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(cons(2nd(s(from(from(from(y0))))), z1)) -> c6(MARK(2nd(s(from(from(from(y0)))))))
   MARK(cons(2nd(s(from(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(cons(2nd(s(from(from(s(y0))))), z1)) -> c6(MARK(2nd(s(from(from(s(y0)))))))
   MARK(cons(2nd(s(cons(cons(y0, y1), y2))), z1)) -> c6(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(cons(2nd(s(cons(s(y0), y1))), z1)) -> c6(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(cons(2nd(s(cons(2nd(s(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(2nd(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(cons(y0, y1)), y2))), z1)) -> c6(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(cons(2nd(s(cons(from(s(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(2nd(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
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   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
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   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
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   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
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   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
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   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
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   MARK(cons(s(cons(s(y0), y1)), z1)) -> c6(MARK(s(cons(s(y0), y1))))
   MARK(cons(s(cons(2nd(cons(y0, y1)), y2)), z1)) -> c6(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(cons(s(cons(2nd(s(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(cons(s(cons(2nd(2nd(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(from(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(cons(s(cons(2nd(2nd(s(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(cons(s(cons(2nd(2nd(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(cons(s(cons(2nd(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(cons(s(cons(2nd(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(cons(s(cons(2nd(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(2nd(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(cons(s(cons(2nd(from(y0)), y1)), z1)) -> c6(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(cons(s(cons(from(cons(y0, y1)), y2)), z1)) -> c6(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(cons(s(cons(from(s(y0)), y1)), z1)) -> c6(MARK(s(cons(from(s(y0)), y1))))
   MARK(cons(s(cons(from(2nd(y0)), y1)), z1)) -> c6(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(cons(s(cons(from(2nd(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(cons(s(cons(from(2nd(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(cons(s(cons(from(2nd(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(2nd(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(cons(s(cons(from(from(y0)), y1)), z1)) -> c6(MARK(s(cons(from(from(y0)), y1))))
   MARK(cons(s(cons(from(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(cons(s(cons(from(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(cons(s(cons(from(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(cons(2nd(s(s(y0))), z1)) -> c6(MARK(2nd(s(s(y0)))))
   MARK(cons(2nd(s(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(cons(2nd(s(2nd(s(y0)))), z1)) -> c6(MARK(2nd(s(2nd(s(y0))))))
   MARK(cons(2nd(s(2nd(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(from(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(s(2nd(2nd(s(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(cons(2nd(s(2nd(from(2nd(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(cons(2nd(s(2nd(from(from(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(cons(2nd(s(2nd(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(cons(2nd(s(2nd(from(s(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(cons(2nd(s(2nd(from(y0)))), z1)) -> c6(MARK(2nd(s(2nd(from(y0))))))
   MARK(cons(2nd(s(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(cons(2nd(s(from(s(y0)))), z1)) -> c6(MARK(2nd(s(from(s(y0))))))
   MARK(cons(2nd(s(from(2nd(y0)))), z1)) -> c6(MARK(2nd(s(from(2nd(y0))))))
   MARK(cons(2nd(s(from(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(cons(2nd(s(from(2nd(from(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(cons(2nd(s(from(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(s(from(2nd(s(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(cons(2nd(s(from(from(y0)))), z1)) -> c6(MARK(2nd(s(from(from(y0))))))
   MARK(cons(2nd(s(from(from(2nd(y0))))), z1)) -> c6(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(cons(2nd(s(from(from(from(y0))))), z1)) -> c6(MARK(2nd(s(from(from(from(y0)))))))
   MARK(cons(2nd(s(from(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(cons(2nd(s(from(from(s(y0))))), z1)) -> c6(MARK(2nd(s(from(from(s(y0)))))))
   MARK(cons(2nd(s(cons(cons(y0, y1), y2))), z1)) -> c6(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(cons(2nd(s(cons(s(y0), y1))), z1)) -> c6(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(cons(2nd(s(cons(2nd(s(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(2nd(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(cons(y0, y1)), y2))), z1)) -> c6(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(cons(2nd(s(cons(from(s(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(2nd(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(133) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(cons(2nd(2nd(y0)), z1)) -> c6(MARK(2nd(2nd(y0)))) by 
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(2nd(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(cons(2nd(2nd(2nd(from(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(cons(2nd(2nd(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(cons(2nd(2nd(2nd(s(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(cons(2nd(2nd(from(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(cons(2nd(2nd(from(from(y0)))), z1)) -> c6(MARK(2nd(2nd(from(from(y0))))))
   MARK(cons(2nd(2nd(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(cons(2nd(2nd(from(s(y0)))), z1)) -> c6(MARK(2nd(2nd(from(s(y0))))))
   MARK(cons(2nd(2nd(s(s(y0)))), z1)) -> c6(MARK(2nd(2nd(s(s(y0))))))
   MARK(cons(2nd(2nd(s(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(2nd(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(from(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(cons(2nd(2nd(s(cons(s(y0), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))

----------------------------------------

(134)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
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   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
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   MARK(cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(cons(2nd(2nd(s(cons(s(y0), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
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   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
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   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
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   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
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   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
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   MARK(cons(2nd(s(cons(from(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(cons(2nd(2nd(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(cons(2nd(2nd(2nd(from(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(cons(2nd(2nd(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(cons(2nd(2nd(2nd(s(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(cons(2nd(2nd(from(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(cons(2nd(2nd(from(from(y0)))), z1)) -> c6(MARK(2nd(2nd(from(from(y0))))))
   MARK(cons(2nd(2nd(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(cons(2nd(2nd(from(s(y0)))), z1)) -> c6(MARK(2nd(2nd(from(s(y0))))))
   MARK(cons(2nd(2nd(s(s(y0)))), z1)) -> c6(MARK(2nd(2nd(s(s(y0))))))
   MARK(cons(2nd(2nd(s(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(2nd(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(from(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(cons(2nd(2nd(s(cons(s(y0), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(135) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(cons(2nd(from(y0)), z1)) -> c6(MARK(2nd(from(y0)))) by 
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(2nd(from(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(cons(2nd(from(2nd(from(y0)))), z1)) -> c6(MARK(2nd(from(2nd(from(y0))))))
   MARK(cons(2nd(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(cons(2nd(from(2nd(s(y0)))), z1)) -> c6(MARK(2nd(from(2nd(s(y0))))))
   MARK(cons(2nd(from(from(2nd(y0)))), z1)) -> c6(MARK(2nd(from(from(2nd(y0))))))
   MARK(cons(2nd(from(from(from(y0)))), z1)) -> c6(MARK(2nd(from(from(from(y0))))))
   MARK(cons(2nd(from(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(cons(2nd(from(from(s(y0)))), z1)) -> c6(MARK(2nd(from(from(s(y0))))))

----------------------------------------

(136)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
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   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
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   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
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   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
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   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
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   MARK(from(s(from(z0)))) -> c5(A__FROM(s(a__from(mark(z0)))), MARK(s(from(z0))))
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   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
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   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__FROM(2nd(s(from(2nd(from(y0)))))) -> c2(MARK(2nd(s(from(2nd(from(y0)))))))
   A__FROM(2nd(s(from(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(from(2nd(s(y0)))))) -> c2(MARK(2nd(s(from(2nd(s(y0)))))))
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   A__FROM(2nd(s(from(from(2nd(y0)))))) -> c2(MARK(2nd(s(from(from(2nd(y0)))))))
   A__FROM(2nd(s(from(from(from(y0)))))) -> c2(MARK(2nd(s(from(from(from(y0)))))))
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   A__FROM(2nd(s(from(from(s(y0)))))) -> c2(MARK(2nd(s(from(from(s(y0)))))))
   A__FROM(2nd(s(cons(cons(y0, y1), y2)))) -> c2(MARK(2nd(s(cons(cons(y0, y1), y2)))))
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   A__FROM(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
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   MARK(cons(s(cons(from(from(y0)), y1)), z1)) -> c6(MARK(s(cons(from(from(y0)), y1))))
   MARK(cons(s(cons(from(from(2nd(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(cons(s(cons(from(from(from(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(cons(s(cons(from(from(cons(y0, y1))), y2)), z1)) -> c6(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(cons(s(cons(from(from(s(y0))), y1)), z1)) -> c6(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(cons(2nd(s(s(y0))), z1)) -> c6(MARK(2nd(s(s(y0)))))
   MARK(cons(2nd(s(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(cons(2nd(s(2nd(s(y0)))), z1)) -> c6(MARK(2nd(s(2nd(s(y0))))))
   MARK(cons(2nd(s(2nd(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(from(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(s(2nd(2nd(s(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(cons(2nd(s(2nd(from(2nd(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(cons(2nd(s(2nd(from(from(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(cons(2nd(s(2nd(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(cons(2nd(s(2nd(from(s(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(cons(2nd(s(2nd(from(y0)))), z1)) -> c6(MARK(2nd(s(2nd(from(y0))))))
   MARK(cons(2nd(s(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(cons(2nd(s(from(s(y0)))), z1)) -> c6(MARK(2nd(s(from(s(y0))))))
   MARK(cons(2nd(s(from(2nd(y0)))), z1)) -> c6(MARK(2nd(s(from(2nd(y0))))))
   MARK(cons(2nd(s(from(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(cons(2nd(s(from(2nd(from(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(cons(2nd(s(from(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(s(from(2nd(s(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(cons(2nd(s(from(from(y0)))), z1)) -> c6(MARK(2nd(s(from(from(y0))))))
   MARK(cons(2nd(s(from(from(2nd(y0))))), z1)) -> c6(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(cons(2nd(s(from(from(from(y0))))), z1)) -> c6(MARK(2nd(s(from(from(from(y0)))))))
   MARK(cons(2nd(s(from(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(cons(2nd(s(from(from(s(y0))))), z1)) -> c6(MARK(2nd(s(from(from(s(y0)))))))
   MARK(cons(2nd(s(cons(cons(y0, y1), y2))), z1)) -> c6(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(cons(2nd(s(cons(s(y0), y1))), z1)) -> c6(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(cons(2nd(s(cons(2nd(s(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(2nd(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(cons(y0, y1)), y2))), z1)) -> c6(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(cons(2nd(s(cons(from(s(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(2nd(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(cons(2nd(2nd(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(cons(2nd(2nd(2nd(from(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(cons(2nd(2nd(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(cons(2nd(2nd(2nd(s(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(cons(2nd(2nd(from(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(cons(2nd(2nd(from(from(y0)))), z1)) -> c6(MARK(2nd(2nd(from(from(y0))))))
   MARK(cons(2nd(2nd(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(cons(2nd(2nd(from(s(y0)))), z1)) -> c6(MARK(2nd(2nd(from(s(y0))))))
   MARK(cons(2nd(2nd(s(s(y0)))), z1)) -> c6(MARK(2nd(2nd(s(s(y0))))))
   MARK(cons(2nd(2nd(s(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(2nd(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(from(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(cons(2nd(2nd(s(cons(s(y0), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(cons(2nd(from(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(cons(2nd(from(2nd(from(y0)))), z1)) -> c6(MARK(2nd(from(2nd(from(y0))))))
   MARK(cons(2nd(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(cons(2nd(from(2nd(s(y0)))), z1)) -> c6(MARK(2nd(from(2nd(s(y0))))))
   MARK(cons(2nd(from(from(2nd(y0)))), z1)) -> c6(MARK(2nd(from(from(2nd(y0))))))
   MARK(cons(2nd(from(from(from(y0)))), z1)) -> c6(MARK(2nd(from(from(from(y0))))))
   MARK(cons(2nd(from(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(cons(2nd(from(from(s(y0)))), z1)) -> c6(MARK(2nd(from(from(s(y0))))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
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   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
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   MARK(cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(cons(2nd(from(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(cons(2nd(from(2nd(from(y0)))), z1)) -> c6(MARK(2nd(from(2nd(from(y0))))))
   MARK(cons(2nd(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(cons(2nd(from(2nd(s(y0)))), z1)) -> c6(MARK(2nd(from(2nd(s(y0))))))
   MARK(cons(2nd(from(from(2nd(y0)))), z1)) -> c6(MARK(2nd(from(from(2nd(y0))))))
   MARK(cons(2nd(from(from(from(y0)))), z1)) -> c6(MARK(2nd(from(from(from(y0))))))
   MARK(cons(2nd(from(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(cons(2nd(from(from(s(y0)))), z1)) -> c6(MARK(2nd(from(from(s(y0))))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(137) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(cons(from(cons(y0, y1)), z1)) -> c6(MARK(from(cons(y0, y1)))) by 
   MARK(cons(from(cons(2nd(y0), z1)), z2)) -> c6(MARK(from(cons(2nd(y0), z1))))
   MARK(cons(from(cons(from(y0), z1)), z2)) -> c6(MARK(from(cons(from(y0), z1))))
   MARK(cons(from(cons(cons(y0, y1), z1)), z2)) -> c6(MARK(from(cons(cons(y0, y1), z1))))
   MARK(cons(from(cons(s(y0), z1)), z2)) -> c6(MARK(from(cons(s(y0), z1))))

----------------------------------------

(138)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
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   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
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   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
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   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
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   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
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   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
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   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
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   MARK(cons(2nd(s(cons(from(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(cons(2nd(2nd(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(cons(2nd(2nd(2nd(from(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(cons(2nd(2nd(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(cons(2nd(2nd(2nd(s(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(cons(2nd(2nd(from(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(cons(2nd(2nd(from(from(y0)))), z1)) -> c6(MARK(2nd(2nd(from(from(y0))))))
   MARK(cons(2nd(2nd(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(cons(2nd(2nd(from(s(y0)))), z1)) -> c6(MARK(2nd(2nd(from(s(y0))))))
   MARK(cons(2nd(2nd(s(s(y0)))), z1)) -> c6(MARK(2nd(2nd(s(s(y0))))))
   MARK(cons(2nd(2nd(s(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(2nd(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(from(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(cons(2nd(2nd(s(cons(s(y0), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(cons(2nd(from(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(cons(2nd(from(2nd(from(y0)))), z1)) -> c6(MARK(2nd(from(2nd(from(y0))))))
   MARK(cons(2nd(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(cons(2nd(from(2nd(s(y0)))), z1)) -> c6(MARK(2nd(from(2nd(s(y0))))))
   MARK(cons(2nd(from(from(2nd(y0)))), z1)) -> c6(MARK(2nd(from(from(2nd(y0))))))
   MARK(cons(2nd(from(from(from(y0)))), z1)) -> c6(MARK(2nd(from(from(from(y0))))))
   MARK(cons(2nd(from(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(cons(2nd(from(from(s(y0)))), z1)) -> c6(MARK(2nd(from(from(s(y0))))))
   MARK(cons(from(cons(2nd(y0), z1)), z2)) -> c6(MARK(from(cons(2nd(y0), z1))))
   MARK(cons(from(cons(from(y0), z1)), z2)) -> c6(MARK(from(cons(from(y0), z1))))
   MARK(cons(from(cons(cons(y0, y1), z1)), z2)) -> c6(MARK(from(cons(cons(y0, y1), z1))))
   MARK(cons(from(cons(s(y0), z1)), z2)) -> c6(MARK(from(cons(s(y0), z1))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
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   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
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   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
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   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
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   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
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   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
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   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
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   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__FROM(2nd(s(from(2nd(from(y0)))))) -> c2(MARK(2nd(s(from(2nd(from(y0)))))))
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   A__FROM(2nd(s(from(from(2nd(y0)))))) -> c2(MARK(2nd(s(from(from(2nd(y0)))))))
   A__FROM(2nd(s(from(from(from(y0)))))) -> c2(MARK(2nd(s(from(from(from(y0)))))))
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   A__FROM(2nd(s(from(from(s(y0)))))) -> c2(MARK(2nd(s(from(from(s(y0)))))))
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   A__FROM(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
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   MARK(cons(2nd(s(2nd(2nd(from(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(s(2nd(2nd(s(y0))))), z1)) -> c6(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(cons(2nd(s(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(cons(2nd(s(2nd(from(2nd(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(cons(2nd(s(2nd(from(from(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(cons(2nd(s(2nd(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(cons(2nd(s(2nd(from(s(y0))))), z1)) -> c6(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(cons(2nd(s(2nd(from(y0)))), z1)) -> c6(MARK(2nd(s(2nd(from(y0))))))
   MARK(cons(2nd(s(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(cons(2nd(s(from(s(y0)))), z1)) -> c6(MARK(2nd(s(from(s(y0))))))
   MARK(cons(2nd(s(from(2nd(y0)))), z1)) -> c6(MARK(2nd(s(from(2nd(y0))))))
   MARK(cons(2nd(s(from(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(cons(2nd(s(from(2nd(from(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(cons(2nd(s(from(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(s(from(2nd(s(y0))))), z1)) -> c6(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(cons(2nd(s(from(from(y0)))), z1)) -> c6(MARK(2nd(s(from(from(y0))))))
   MARK(cons(2nd(s(from(from(2nd(y0))))), z1)) -> c6(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(cons(2nd(s(from(from(from(y0))))), z1)) -> c6(MARK(2nd(s(from(from(from(y0)))))))
   MARK(cons(2nd(s(from(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(cons(2nd(s(from(from(s(y0))))), z1)) -> c6(MARK(2nd(s(from(from(s(y0)))))))
   MARK(cons(2nd(s(cons(cons(y0, y1), y2))), z1)) -> c6(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(cons(2nd(s(cons(s(y0), y1))), z1)) -> c6(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(cons(2nd(s(cons(2nd(s(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(2nd(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(2nd(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(2nd(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(cons(y0, y1)), y2))), z1)) -> c6(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(cons(2nd(s(cons(from(s(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(2nd(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(y0)), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(cons(2nd(s(cons(from(from(2nd(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(from(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z1)) -> c6(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(cons(2nd(s(cons(from(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(cons(2nd(2nd(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(cons(2nd(2nd(2nd(from(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(cons(2nd(2nd(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(cons(2nd(2nd(2nd(s(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(cons(2nd(2nd(from(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(cons(2nd(2nd(from(from(y0)))), z1)) -> c6(MARK(2nd(2nd(from(from(y0))))))
   MARK(cons(2nd(2nd(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(cons(2nd(2nd(from(s(y0)))), z1)) -> c6(MARK(2nd(2nd(from(s(y0))))))
   MARK(cons(2nd(2nd(s(s(y0)))), z1)) -> c6(MARK(2nd(2nd(s(s(y0))))))
   MARK(cons(2nd(2nd(s(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(2nd(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(from(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(cons(2nd(2nd(s(cons(s(y0), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(cons(2nd(from(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(cons(2nd(from(2nd(from(y0)))), z1)) -> c6(MARK(2nd(from(2nd(from(y0))))))
   MARK(cons(2nd(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(cons(2nd(from(2nd(s(y0)))), z1)) -> c6(MARK(2nd(from(2nd(s(y0))))))
   MARK(cons(2nd(from(from(2nd(y0)))), z1)) -> c6(MARK(2nd(from(from(2nd(y0))))))
   MARK(cons(2nd(from(from(from(y0)))), z1)) -> c6(MARK(2nd(from(from(from(y0))))))
   MARK(cons(2nd(from(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(cons(2nd(from(from(s(y0)))), z1)) -> c6(MARK(2nd(from(from(s(y0))))))
   MARK(cons(from(cons(2nd(y0), z1)), z2)) -> c6(MARK(from(cons(2nd(y0), z1))))
   MARK(cons(from(cons(from(y0), z1)), z2)) -> c6(MARK(from(cons(from(y0), z1))))
   MARK(cons(from(cons(cons(y0, y1), z1)), z2)) -> c6(MARK(from(cons(cons(y0, y1), z1))))
   MARK(cons(from(cons(s(y0), z1)), z2)) -> c6(MARK(from(cons(s(y0), z1))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(139) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(cons(from(s(y0)), z1)) -> c6(MARK(from(s(y0)))) by 
   MARK(cons(from(s(2nd(y0))), z1)) -> c6(MARK(from(s(2nd(y0)))))
   MARK(cons(from(s(from(y0))), z1)) -> c6(MARK(from(s(from(y0)))))
   MARK(cons(from(s(cons(y0, y1))), z1)) -> c6(MARK(from(s(cons(y0, y1)))))
   MARK(cons(from(s(s(y0))), z1)) -> c6(MARK(from(s(s(y0)))))

----------------------------------------

(140)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
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   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
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   MARK(cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(cons(2nd(from(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(cons(2nd(from(2nd(from(y0)))), z1)) -> c6(MARK(2nd(from(2nd(from(y0))))))
   MARK(cons(2nd(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(cons(2nd(from(2nd(s(y0)))), z1)) -> c6(MARK(2nd(from(2nd(s(y0))))))
   MARK(cons(2nd(from(from(2nd(y0)))), z1)) -> c6(MARK(2nd(from(from(2nd(y0))))))
   MARK(cons(2nd(from(from(from(y0)))), z1)) -> c6(MARK(2nd(from(from(from(y0))))))
   MARK(cons(2nd(from(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(cons(2nd(from(from(s(y0)))), z1)) -> c6(MARK(2nd(from(from(s(y0))))))
   MARK(cons(from(cons(2nd(y0), z1)), z2)) -> c6(MARK(from(cons(2nd(y0), z1))))
   MARK(cons(from(cons(from(y0), z1)), z2)) -> c6(MARK(from(cons(from(y0), z1))))
   MARK(cons(from(cons(cons(y0, y1), z1)), z2)) -> c6(MARK(from(cons(cons(y0, y1), z1))))
   MARK(cons(from(cons(s(y0), z1)), z2)) -> c6(MARK(from(cons(s(y0), z1))))
   MARK(cons(from(s(2nd(y0))), z1)) -> c6(MARK(from(s(2nd(y0)))))
   MARK(cons(from(s(from(y0))), z1)) -> c6(MARK(from(s(from(y0)))))
   MARK(cons(from(s(cons(y0, y1))), z1)) -> c6(MARK(from(s(cons(y0, y1)))))
   MARK(cons(from(s(s(y0))), z1)) -> c6(MARK(from(s(s(y0)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(s(y0))) -> c7(MARK(s(y0)))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
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   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
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   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
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   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
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   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
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   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
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   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
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   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
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   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
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   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
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   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
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   MARK(cons(2nd(s(cons(from(from(s(y0))), y1))), z1)) -> c6(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(cons(2nd(2nd(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(cons(2nd(2nd(2nd(from(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(cons(2nd(2nd(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(cons(2nd(2nd(2nd(s(y0)))), z1)) -> c6(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(cons(2nd(2nd(from(2nd(y0)))), z1)) -> c6(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(cons(2nd(2nd(from(from(y0)))), z1)) -> c6(MARK(2nd(2nd(from(from(y0))))))
   MARK(cons(2nd(2nd(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(cons(2nd(2nd(from(s(y0)))), z1)) -> c6(MARK(2nd(2nd(from(s(y0))))))
   MARK(cons(2nd(2nd(s(s(y0)))), z1)) -> c6(MARK(2nd(2nd(s(s(y0))))))
   MARK(cons(2nd(2nd(s(2nd(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(2nd(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(2nd(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(2nd(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(cons(y0, y1))))), z1)) -> c6(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(cons(2nd(2nd(s(from(s(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(2nd(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(y0))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(cons(2nd(2nd(s(from(from(2nd(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(from(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(cons(2nd(2nd(s(from(from(s(y0)))))), z1)) -> c6(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(cons(2nd(2nd(s(cons(s(y0), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(cons(2nd(from(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(cons(2nd(from(2nd(from(y0)))), z1)) -> c6(MARK(2nd(from(2nd(from(y0))))))
   MARK(cons(2nd(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(cons(2nd(from(2nd(s(y0)))), z1)) -> c6(MARK(2nd(from(2nd(s(y0))))))
   MARK(cons(2nd(from(from(2nd(y0)))), z1)) -> c6(MARK(2nd(from(from(2nd(y0))))))
   MARK(cons(2nd(from(from(from(y0)))), z1)) -> c6(MARK(2nd(from(from(from(y0))))))
   MARK(cons(2nd(from(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(cons(2nd(from(from(s(y0)))), z1)) -> c6(MARK(2nd(from(from(s(y0))))))
   MARK(cons(from(cons(2nd(y0), z1)), z2)) -> c6(MARK(from(cons(2nd(y0), z1))))
   MARK(cons(from(cons(from(y0), z1)), z2)) -> c6(MARK(from(cons(from(y0), z1))))
   MARK(cons(from(cons(cons(y0, y1), z1)), z2)) -> c6(MARK(from(cons(cons(y0, y1), z1))))
   MARK(cons(from(cons(s(y0), z1)), z2)) -> c6(MARK(from(cons(s(y0), z1))))
   MARK(cons(from(s(2nd(y0))), z1)) -> c6(MARK(from(s(2nd(y0)))))
   MARK(cons(from(s(from(y0))), z1)) -> c6(MARK(from(s(from(y0)))))
   MARK(cons(from(s(cons(y0, y1))), z1)) -> c6(MARK(from(s(cons(y0, y1)))))
   MARK(cons(from(s(s(y0))), z1)) -> c6(MARK(from(s(s(y0)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(141) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(s(s(y0))) -> c7(MARK(s(y0))) by 
   MARK(s(s(s(y0)))) -> c7(MARK(s(s(y0))))
   MARK(s(s(2nd(cons(y0, y1))))) -> c7(MARK(s(2nd(cons(y0, y1)))))
   MARK(s(s(2nd(s(y0))))) -> c7(MARK(s(2nd(s(y0)))))
   MARK(s(s(2nd(2nd(2nd(y0)))))) -> c7(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(s(s(2nd(2nd(from(y0)))))) -> c7(MARK(s(2nd(2nd(from(y0))))))
   MARK(s(s(2nd(2nd(cons(y0, y1)))))) -> c7(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(s(s(2nd(2nd(s(y0)))))) -> c7(MARK(s(2nd(2nd(s(y0))))))
   MARK(s(s(2nd(2nd(y0))))) -> c7(MARK(s(2nd(2nd(y0)))))
   MARK(s(s(2nd(from(2nd(y0)))))) -> c7(MARK(s(2nd(from(2nd(y0))))))
   MARK(s(s(2nd(from(from(y0)))))) -> c7(MARK(s(2nd(from(from(y0))))))
   MARK(s(s(2nd(from(cons(y0, y1)))))) -> c7(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(s(s(2nd(from(s(y0)))))) -> c7(MARK(s(2nd(from(s(y0))))))
   MARK(s(s(2nd(from(y0))))) -> c7(MARK(s(2nd(from(y0)))))
   MARK(s(s(from(cons(y0, y1))))) -> c7(MARK(s(from(cons(y0, y1)))))
   MARK(s(s(from(s(y0))))) -> c7(MARK(s(from(s(y0)))))
   MARK(s(s(from(2nd(y0))))) -> c7(MARK(s(from(2nd(y0)))))
   MARK(s(s(from(2nd(2nd(y0)))))) -> c7(MARK(s(from(2nd(2nd(y0))))))
   MARK(s(s(from(2nd(from(y0)))))) -> c7(MARK(s(from(2nd(from(y0))))))
   MARK(s(s(from(2nd(cons(y0, y1)))))) -> c7(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(s(s(from(2nd(s(y0)))))) -> c7(MARK(s(from(2nd(s(y0))))))
   MARK(s(s(from(from(y0))))) -> c7(MARK(s(from(from(y0)))))
   MARK(s(s(from(from(2nd(y0)))))) -> c7(MARK(s(from(from(2nd(y0))))))
   MARK(s(s(from(from(from(y0)))))) -> c7(MARK(s(from(from(from(y0))))))
   MARK(s(s(from(from(cons(y0, y1)))))) -> c7(MARK(s(from(from(cons(y0, y1))))))
   MARK(s(s(from(from(s(y0)))))) -> c7(MARK(s(from(from(s(y0))))))
   MARK(s(s(cons(cons(y0, y1), y2)))) -> c7(MARK(s(cons(cons(y0, y1), y2))))
   MARK(s(s(cons(s(y0), y1)))) -> c7(MARK(s(cons(s(y0), y1))))
   MARK(s(s(cons(2nd(cons(y0, y1)), y2)))) -> c7(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(s(s(cons(2nd(s(y0)), y1)))) -> c7(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(s(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c7(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(s(s(cons(2nd(2nd(from(y0))), y1)))) -> c7(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(s(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(s(s(cons(2nd(2nd(s(y0))), y1)))) -> c7(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(s(s(cons(2nd(2nd(y0)), y1)))) -> c7(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(s(s(cons(2nd(from(2nd(y0))), y1)))) -> c7(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(s(s(cons(2nd(from(from(y0))), y1)))) -> c7(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(s(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(s(s(cons(2nd(from(s(y0))), y1)))) -> c7(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(s(s(cons(2nd(from(y0)), y1)))) -> c7(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(s(s(cons(from(cons(y0, y1)), y2)))) -> c7(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(s(s(cons(from(s(y0)), y1)))) -> c7(MARK(s(cons(from(s(y0)), y1))))
   MARK(s(s(cons(from(2nd(y0)), y1)))) -> c7(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(s(s(cons(from(2nd(2nd(y0))), y1)))) -> c7(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(s(s(cons(from(2nd(from(y0))), y1)))) -> c7(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(s(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(s(s(cons(from(2nd(s(y0))), y1)))) -> c7(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(s(s(cons(from(from(y0)), y1)))) -> c7(MARK(s(cons(from(from(y0)), y1))))
   MARK(s(s(cons(from(from(2nd(y0))), y1)))) -> c7(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(s(s(cons(from(from(from(y0))), y1)))) -> c7(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(s(s(cons(from(from(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(s(s(cons(from(from(s(y0))), y1)))) -> c7(MARK(s(cons(from(from(s(y0))), y1))))

----------------------------------------

(142)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
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   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
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   MARK(cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z1)) -> c6(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(cons(2nd(from(2nd(2nd(y0)))), z1)) -> c6(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(cons(2nd(from(2nd(from(y0)))), z1)) -> c6(MARK(2nd(from(2nd(from(y0))))))
   MARK(cons(2nd(from(2nd(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(cons(2nd(from(2nd(s(y0)))), z1)) -> c6(MARK(2nd(from(2nd(s(y0))))))
   MARK(cons(2nd(from(from(2nd(y0)))), z1)) -> c6(MARK(2nd(from(from(2nd(y0))))))
   MARK(cons(2nd(from(from(from(y0)))), z1)) -> c6(MARK(2nd(from(from(from(y0))))))
   MARK(cons(2nd(from(from(cons(y0, y1)))), z1)) -> c6(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(cons(2nd(from(from(s(y0)))), z1)) -> c6(MARK(2nd(from(from(s(y0))))))
   MARK(cons(from(cons(2nd(y0), z1)), z2)) -> c6(MARK(from(cons(2nd(y0), z1))))
   MARK(cons(from(cons(from(y0), z1)), z2)) -> c6(MARK(from(cons(from(y0), z1))))
   MARK(cons(from(cons(cons(y0, y1), z1)), z2)) -> c6(MARK(from(cons(cons(y0, y1), z1))))
   MARK(cons(from(cons(s(y0), z1)), z2)) -> c6(MARK(from(cons(s(y0), z1))))
   MARK(cons(from(s(2nd(y0))), z1)) -> c6(MARK(from(s(2nd(y0)))))
   MARK(cons(from(s(from(y0))), z1)) -> c6(MARK(from(s(from(y0)))))
   MARK(cons(from(s(cons(y0, y1))), z1)) -> c6(MARK(from(s(cons(y0, y1)))))
   MARK(cons(from(s(s(y0))), z1)) -> c6(MARK(from(s(s(y0)))))
   MARK(s(s(s(y0)))) -> c7(MARK(s(s(y0))))
   MARK(s(s(2nd(cons(y0, y1))))) -> c7(MARK(s(2nd(cons(y0, y1)))))
   MARK(s(s(2nd(s(y0))))) -> c7(MARK(s(2nd(s(y0)))))
   MARK(s(s(2nd(2nd(2nd(y0)))))) -> c7(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(s(s(2nd(2nd(from(y0)))))) -> c7(MARK(s(2nd(2nd(from(y0))))))
   MARK(s(s(2nd(2nd(cons(y0, y1)))))) -> c7(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(s(s(2nd(2nd(s(y0)))))) -> c7(MARK(s(2nd(2nd(s(y0))))))
   MARK(s(s(2nd(2nd(y0))))) -> c7(MARK(s(2nd(2nd(y0)))))
   MARK(s(s(2nd(from(2nd(y0)))))) -> c7(MARK(s(2nd(from(2nd(y0))))))
   MARK(s(s(2nd(from(from(y0)))))) -> c7(MARK(s(2nd(from(from(y0))))))
   MARK(s(s(2nd(from(cons(y0, y1)))))) -> c7(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(s(s(2nd(from(s(y0)))))) -> c7(MARK(s(2nd(from(s(y0))))))
   MARK(s(s(2nd(from(y0))))) -> c7(MARK(s(2nd(from(y0)))))
   MARK(s(s(from(cons(y0, y1))))) -> c7(MARK(s(from(cons(y0, y1)))))
   MARK(s(s(from(s(y0))))) -> c7(MARK(s(from(s(y0)))))
   MARK(s(s(from(2nd(y0))))) -> c7(MARK(s(from(2nd(y0)))))
   MARK(s(s(from(2nd(2nd(y0)))))) -> c7(MARK(s(from(2nd(2nd(y0))))))
   MARK(s(s(from(2nd(from(y0)))))) -> c7(MARK(s(from(2nd(from(y0))))))
   MARK(s(s(from(2nd(cons(y0, y1)))))) -> c7(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(s(s(from(2nd(s(y0)))))) -> c7(MARK(s(from(2nd(s(y0))))))
   MARK(s(s(from(from(y0))))) -> c7(MARK(s(from(from(y0)))))
   MARK(s(s(from(from(2nd(y0)))))) -> c7(MARK(s(from(from(2nd(y0))))))
   MARK(s(s(from(from(from(y0)))))) -> c7(MARK(s(from(from(from(y0))))))
   MARK(s(s(from(from(cons(y0, y1)))))) -> c7(MARK(s(from(from(cons(y0, y1))))))
   MARK(s(s(from(from(s(y0)))))) -> c7(MARK(s(from(from(s(y0))))))
   MARK(s(s(cons(cons(y0, y1), y2)))) -> c7(MARK(s(cons(cons(y0, y1), y2))))
   MARK(s(s(cons(s(y0), y1)))) -> c7(MARK(s(cons(s(y0), y1))))
   MARK(s(s(cons(2nd(cons(y0, y1)), y2)))) -> c7(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(s(s(cons(2nd(s(y0)), y1)))) -> c7(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(s(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c7(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(s(s(cons(2nd(2nd(from(y0))), y1)))) -> c7(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(s(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(s(s(cons(2nd(2nd(s(y0))), y1)))) -> c7(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(s(s(cons(2nd(2nd(y0)), y1)))) -> c7(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(s(s(cons(2nd(from(2nd(y0))), y1)))) -> c7(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(s(s(cons(2nd(from(from(y0))), y1)))) -> c7(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(s(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(s(s(cons(2nd(from(s(y0))), y1)))) -> c7(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(s(s(cons(2nd(from(y0)), y1)))) -> c7(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(s(s(cons(from(cons(y0, y1)), y2)))) -> c7(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(s(s(cons(from(s(y0)), y1)))) -> c7(MARK(s(cons(from(s(y0)), y1))))
   MARK(s(s(cons(from(2nd(y0)), y1)))) -> c7(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(s(s(cons(from(2nd(2nd(y0))), y1)))) -> c7(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(s(s(cons(from(2nd(from(y0))), y1)))) -> c7(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(s(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(s(s(cons(from(2nd(s(y0))), y1)))) -> c7(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(s(s(cons(from(from(y0)), y1)))) -> c7(MARK(s(cons(from(from(y0)), y1))))
   MARK(s(s(cons(from(from(2nd(y0))), y1)))) -> c7(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(s(s(cons(from(from(from(y0))), y1)))) -> c7(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(s(s(cons(from(from(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(s(s(cons(from(from(s(y0))), y1)))) -> c7(MARK(s(cons(from(from(s(y0))), y1))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
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   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
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   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
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   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
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   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
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   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
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   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
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   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
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   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
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   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
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   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__FROM(2nd(s(from(2nd(from(y0)))))) -> c2(MARK(2nd(s(from(2nd(from(y0)))))))
   A__FROM(2nd(s(from(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(from(2nd(s(y0)))))) -> c2(MARK(2nd(s(from(2nd(s(y0)))))))
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   A__FROM(2nd(s(from(from(2nd(y0)))))) -> c2(MARK(2nd(s(from(from(2nd(y0)))))))
   A__FROM(2nd(s(from(from(from(y0)))))) -> c2(MARK(2nd(s(from(from(from(y0)))))))
   A__FROM(2nd(s(from(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__FROM(2nd(s(from(from(s(y0)))))) -> c2(MARK(2nd(s(from(from(s(y0)))))))
   A__FROM(2nd(s(cons(cons(y0, y1), y2)))) -> c2(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__FROM(2nd(s(cons(s(y0), y1)))) -> c2(MARK(2nd(s(cons(s(y0), y1)))))
   A__FROM(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
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   A__FROM(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
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   A__FROM(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
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   A__FROM(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c2(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
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   A__FROM(2nd(s(cons(from(2nd(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
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   A__FROM(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(y0)), y1)))) -> c2(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__FROM(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(from(y0))), y1)))) -> c2(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__FROM(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c2(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
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   MARK(s(s(cons(from(from(s(y0))), y1)))) -> c7(MARK(s(cons(from(from(s(y0))), y1))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(143) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(s(2nd(s(y0)))) -> c7(MARK(2nd(s(y0)))) by 
   MARK(s(2nd(s(s(y0))))) -> c7(MARK(2nd(s(s(y0)))))
   MARK(s(2nd(s(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(s(2nd(s(2nd(s(y0)))))) -> c7(MARK(2nd(s(2nd(s(y0))))))
   MARK(s(2nd(s(2nd(2nd(2nd(y0))))))) -> c7(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(s(2nd(s(2nd(2nd(from(y0))))))) -> c7(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(s(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(s(2nd(s(2nd(2nd(s(y0))))))) -> c7(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(s(2nd(s(2nd(2nd(y0)))))) -> c7(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(s(2nd(s(2nd(from(2nd(y0))))))) -> c7(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(s(2nd(s(2nd(from(from(y0))))))) -> c7(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(s(2nd(s(2nd(from(cons(y0, y1))))))) -> c7(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(s(2nd(s(2nd(from(s(y0))))))) -> c7(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(s(2nd(s(2nd(from(y0)))))) -> c7(MARK(2nd(s(2nd(from(y0))))))
   MARK(s(2nd(s(from(cons(y0, y1)))))) -> c7(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(s(2nd(s(from(s(y0)))))) -> c7(MARK(2nd(s(from(s(y0))))))
   MARK(s(2nd(s(from(2nd(y0)))))) -> c7(MARK(2nd(s(from(2nd(y0))))))
   MARK(s(2nd(s(from(2nd(2nd(y0))))))) -> c7(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(s(2nd(s(from(2nd(from(y0))))))) -> c7(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(s(2nd(s(from(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(s(2nd(s(from(2nd(s(y0))))))) -> c7(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(s(2nd(s(from(from(y0)))))) -> c7(MARK(2nd(s(from(from(y0))))))
   MARK(s(2nd(s(from(from(2nd(y0))))))) -> c7(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(s(2nd(s(from(from(from(y0))))))) -> c7(MARK(2nd(s(from(from(from(y0)))))))
   MARK(s(2nd(s(from(from(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(s(2nd(s(from(from(s(y0))))))) -> c7(MARK(2nd(s(from(from(s(y0)))))))
   MARK(s(2nd(s(cons(cons(y0, y1), y2))))) -> c7(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(s(2nd(s(cons(s(y0), y1))))) -> c7(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(s(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(2nd(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(from(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(s(y0))), y1)))))

----------------------------------------

(144)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
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   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
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   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
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   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
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   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
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   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
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   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
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   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
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   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
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   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
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   MARK(s(2nd(s(2nd(from(from(y0))))))) -> c7(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(s(2nd(s(2nd(from(cons(y0, y1))))))) -> c7(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(s(2nd(s(2nd(from(s(y0))))))) -> c7(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(s(2nd(s(2nd(from(y0)))))) -> c7(MARK(2nd(s(2nd(from(y0))))))
   MARK(s(2nd(s(from(cons(y0, y1)))))) -> c7(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(s(2nd(s(from(s(y0)))))) -> c7(MARK(2nd(s(from(s(y0))))))
   MARK(s(2nd(s(from(2nd(y0)))))) -> c7(MARK(2nd(s(from(2nd(y0))))))
   MARK(s(2nd(s(from(2nd(2nd(y0))))))) -> c7(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(s(2nd(s(from(2nd(from(y0))))))) -> c7(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(s(2nd(s(from(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(s(2nd(s(from(2nd(s(y0))))))) -> c7(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(s(2nd(s(from(from(y0)))))) -> c7(MARK(2nd(s(from(from(y0))))))
   MARK(s(2nd(s(from(from(2nd(y0))))))) -> c7(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(s(2nd(s(from(from(from(y0))))))) -> c7(MARK(2nd(s(from(from(from(y0)))))))
   MARK(s(2nd(s(from(from(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(s(2nd(s(from(from(s(y0))))))) -> c7(MARK(2nd(s(from(from(s(y0)))))))
   MARK(s(2nd(s(cons(cons(y0, y1), y2))))) -> c7(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(s(2nd(s(cons(s(y0), y1))))) -> c7(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(s(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(2nd(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(from(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
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   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
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   MARK(s(2nd(s(from(from(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(s(2nd(s(from(from(s(y0))))))) -> c7(MARK(2nd(s(from(from(s(y0)))))))
   MARK(s(2nd(s(cons(cons(y0, y1), y2))))) -> c7(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(s(2nd(s(cons(s(y0), y1))))) -> c7(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(s(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(2nd(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(from(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(145) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(s(2nd(2nd(y0)))) -> c7(MARK(2nd(2nd(y0)))) by 
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(2nd(2nd(2nd(y0)))))) -> c7(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(s(2nd(2nd(2nd(from(y0)))))) -> c7(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(s(2nd(2nd(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(s(2nd(2nd(2nd(s(y0)))))) -> c7(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(s(2nd(2nd(from(2nd(y0)))))) -> c7(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(s(2nd(2nd(from(from(y0)))))) -> c7(MARK(2nd(2nd(from(from(y0))))))
   MARK(s(2nd(2nd(from(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(s(2nd(2nd(from(s(y0)))))) -> c7(MARK(2nd(2nd(from(s(y0))))))
   MARK(s(2nd(2nd(s(s(y0)))))) -> c7(MARK(2nd(2nd(s(s(y0))))))
   MARK(s(2nd(2nd(s(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(2nd(s(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(s(2nd(2nd(s(2nd(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(s(2nd(2nd(s(2nd(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(s(2nd(2nd(s(from(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(from(s(y0))))))) -> c7(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(from(from(y0))))))) -> c7(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(s(2nd(2nd(s(from(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(s(2nd(2nd(s(from(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(s(2nd(2nd(s(cons(cons(y0, y1), y2)))))) -> c7(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(s(2nd(2nd(s(cons(s(y0), y1)))))) -> c7(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(from(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))

----------------------------------------

(146)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
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   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
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   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
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   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
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   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
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   MARK(from(s(from(z0)))) -> c5(A__FROM(s(a__from(mark(z0)))), MARK(s(from(z0))))
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   MARK(from(s(s(z0)))) -> c5(A__FROM(s(s(mark(z0)))), MARK(s(s(z0))))
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   A__FROM(2nd(s(2nd(cons(y0, y1))))) -> c2(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(2nd(s(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__FROM(2nd(s(2nd(2nd(y0))))) -> c2(MARK(2nd(s(2nd(2nd(y0))))))
   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
   A__FROM(2nd(s(2nd(from(y0))))) -> c2(MARK(2nd(s(2nd(from(y0))))))
   A__FROM(2nd(s(from(cons(y0, y1))))) -> c2(MARK(2nd(s(from(cons(y0, y1))))))
   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
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   MARK(s(s(2nd(from(s(y0)))))) -> c7(MARK(s(2nd(from(s(y0))))))
   MARK(s(s(2nd(from(y0))))) -> c7(MARK(s(2nd(from(y0)))))
   MARK(s(s(from(cons(y0, y1))))) -> c7(MARK(s(from(cons(y0, y1)))))
   MARK(s(s(from(s(y0))))) -> c7(MARK(s(from(s(y0)))))
   MARK(s(s(from(2nd(y0))))) -> c7(MARK(s(from(2nd(y0)))))
   MARK(s(s(from(2nd(2nd(y0)))))) -> c7(MARK(s(from(2nd(2nd(y0))))))
   MARK(s(s(from(2nd(from(y0)))))) -> c7(MARK(s(from(2nd(from(y0))))))
   MARK(s(s(from(2nd(cons(y0, y1)))))) -> c7(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(s(s(from(2nd(s(y0)))))) -> c7(MARK(s(from(2nd(s(y0))))))
   MARK(s(s(from(from(y0))))) -> c7(MARK(s(from(from(y0)))))
   MARK(s(s(from(from(2nd(y0)))))) -> c7(MARK(s(from(from(2nd(y0))))))
   MARK(s(s(from(from(from(y0)))))) -> c7(MARK(s(from(from(from(y0))))))
   MARK(s(s(from(from(cons(y0, y1)))))) -> c7(MARK(s(from(from(cons(y0, y1))))))
   MARK(s(s(from(from(s(y0)))))) -> c7(MARK(s(from(from(s(y0))))))
   MARK(s(s(cons(cons(y0, y1), y2)))) -> c7(MARK(s(cons(cons(y0, y1), y2))))
   MARK(s(s(cons(s(y0), y1)))) -> c7(MARK(s(cons(s(y0), y1))))
   MARK(s(s(cons(2nd(cons(y0, y1)), y2)))) -> c7(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(s(s(cons(2nd(s(y0)), y1)))) -> c7(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(s(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c7(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(s(s(cons(2nd(2nd(from(y0))), y1)))) -> c7(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(s(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(s(s(cons(2nd(2nd(s(y0))), y1)))) -> c7(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(s(s(cons(2nd(2nd(y0)), y1)))) -> c7(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(s(s(cons(2nd(from(2nd(y0))), y1)))) -> c7(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(s(s(cons(2nd(from(from(y0))), y1)))) -> c7(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(s(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(s(s(cons(2nd(from(s(y0))), y1)))) -> c7(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(s(s(cons(2nd(from(y0)), y1)))) -> c7(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(s(s(cons(from(cons(y0, y1)), y2)))) -> c7(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(s(s(cons(from(s(y0)), y1)))) -> c7(MARK(s(cons(from(s(y0)), y1))))
   MARK(s(s(cons(from(2nd(y0)), y1)))) -> c7(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(s(s(cons(from(2nd(2nd(y0))), y1)))) -> c7(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(s(s(cons(from(2nd(from(y0))), y1)))) -> c7(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(s(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(s(s(cons(from(2nd(s(y0))), y1)))) -> c7(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(s(s(cons(from(from(y0)), y1)))) -> c7(MARK(s(cons(from(from(y0)), y1))))
   MARK(s(s(cons(from(from(2nd(y0))), y1)))) -> c7(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(s(s(cons(from(from(from(y0))), y1)))) -> c7(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(s(s(cons(from(from(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(s(s(cons(from(from(s(y0))), y1)))) -> c7(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(s(2nd(s(s(y0))))) -> c7(MARK(2nd(s(s(y0)))))
   MARK(s(2nd(s(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(s(2nd(s(2nd(s(y0)))))) -> c7(MARK(2nd(s(2nd(s(y0))))))
   MARK(s(2nd(s(2nd(2nd(2nd(y0))))))) -> c7(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(s(2nd(s(2nd(2nd(from(y0))))))) -> c7(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(s(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(s(2nd(s(2nd(2nd(s(y0))))))) -> c7(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(s(2nd(s(2nd(2nd(y0)))))) -> c7(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(s(2nd(s(2nd(from(2nd(y0))))))) -> c7(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(s(2nd(s(2nd(from(from(y0))))))) -> c7(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(s(2nd(s(2nd(from(cons(y0, y1))))))) -> c7(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(s(2nd(s(2nd(from(s(y0))))))) -> c7(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(s(2nd(s(2nd(from(y0)))))) -> c7(MARK(2nd(s(2nd(from(y0))))))
   MARK(s(2nd(s(from(cons(y0, y1)))))) -> c7(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(s(2nd(s(from(s(y0)))))) -> c7(MARK(2nd(s(from(s(y0))))))
   MARK(s(2nd(s(from(2nd(y0)))))) -> c7(MARK(2nd(s(from(2nd(y0))))))
   MARK(s(2nd(s(from(2nd(2nd(y0))))))) -> c7(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(s(2nd(s(from(2nd(from(y0))))))) -> c7(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(s(2nd(s(from(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(s(2nd(s(from(2nd(s(y0))))))) -> c7(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(s(2nd(s(from(from(y0)))))) -> c7(MARK(2nd(s(from(from(y0))))))
   MARK(s(2nd(s(from(from(2nd(y0))))))) -> c7(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(s(2nd(s(from(from(from(y0))))))) -> c7(MARK(2nd(s(from(from(from(y0)))))))
   MARK(s(2nd(s(from(from(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(s(2nd(s(from(from(s(y0))))))) -> c7(MARK(2nd(s(from(from(s(y0)))))))
   MARK(s(2nd(s(cons(cons(y0, y1), y2))))) -> c7(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(s(2nd(s(cons(s(y0), y1))))) -> c7(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(s(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(2nd(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(from(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(s(2nd(2nd(2nd(2nd(y0)))))) -> c7(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(s(2nd(2nd(2nd(from(y0)))))) -> c7(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(s(2nd(2nd(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(s(2nd(2nd(2nd(s(y0)))))) -> c7(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(s(2nd(2nd(from(2nd(y0)))))) -> c7(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(s(2nd(2nd(from(from(y0)))))) -> c7(MARK(2nd(2nd(from(from(y0))))))
   MARK(s(2nd(2nd(from(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(s(2nd(2nd(from(s(y0)))))) -> c7(MARK(2nd(2nd(from(s(y0))))))
   MARK(s(2nd(2nd(s(s(y0)))))) -> c7(MARK(2nd(2nd(s(s(y0))))))
   MARK(s(2nd(2nd(s(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(2nd(s(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(s(2nd(2nd(s(2nd(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(s(2nd(2nd(s(2nd(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(s(2nd(2nd(s(from(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(from(s(y0))))))) -> c7(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(from(from(y0))))))) -> c7(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(s(2nd(2nd(s(from(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(s(2nd(2nd(s(from(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(s(2nd(2nd(s(cons(cons(y0, y1), y2)))))) -> c7(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(s(2nd(2nd(s(cons(s(y0), y1)))))) -> c7(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(from(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
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   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
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   MARK(s(2nd(2nd(s(from(s(y0))))))) -> c7(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(from(from(y0))))))) -> c7(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(s(2nd(2nd(s(from(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(s(2nd(2nd(s(from(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(s(2nd(2nd(s(cons(cons(y0, y1), y2)))))) -> c7(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(s(2nd(2nd(s(cons(s(y0), y1)))))) -> c7(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(from(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(147) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(s(2nd(from(y0)))) -> c7(MARK(2nd(from(y0)))) by 
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(2nd(from(2nd(2nd(y0)))))) -> c7(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(s(2nd(from(2nd(from(y0)))))) -> c7(MARK(2nd(from(2nd(from(y0))))))
   MARK(s(2nd(from(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(s(2nd(from(2nd(s(y0)))))) -> c7(MARK(2nd(from(2nd(s(y0))))))
   MARK(s(2nd(from(from(2nd(y0)))))) -> c7(MARK(2nd(from(from(2nd(y0))))))
   MARK(s(2nd(from(from(from(y0)))))) -> c7(MARK(2nd(from(from(from(y0))))))
   MARK(s(2nd(from(from(cons(y0, y1)))))) -> c7(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(s(2nd(from(from(s(y0)))))) -> c7(MARK(2nd(from(from(s(y0))))))

----------------------------------------

(148)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
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   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
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   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
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   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
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   MARK(s(2nd(s(2nd(from(s(y0))))))) -> c7(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(s(2nd(s(2nd(from(y0)))))) -> c7(MARK(2nd(s(2nd(from(y0))))))
   MARK(s(2nd(s(from(cons(y0, y1)))))) -> c7(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(s(2nd(s(from(s(y0)))))) -> c7(MARK(2nd(s(from(s(y0))))))
   MARK(s(2nd(s(from(2nd(y0)))))) -> c7(MARK(2nd(s(from(2nd(y0))))))
   MARK(s(2nd(s(from(2nd(2nd(y0))))))) -> c7(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(s(2nd(s(from(2nd(from(y0))))))) -> c7(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(s(2nd(s(from(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(s(2nd(s(from(2nd(s(y0))))))) -> c7(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(s(2nd(s(from(from(y0)))))) -> c7(MARK(2nd(s(from(from(y0))))))
   MARK(s(2nd(s(from(from(2nd(y0))))))) -> c7(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(s(2nd(s(from(from(from(y0))))))) -> c7(MARK(2nd(s(from(from(from(y0)))))))
   MARK(s(2nd(s(from(from(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(s(2nd(s(from(from(s(y0))))))) -> c7(MARK(2nd(s(from(from(s(y0)))))))
   MARK(s(2nd(s(cons(cons(y0, y1), y2))))) -> c7(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(s(2nd(s(cons(s(y0), y1))))) -> c7(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(s(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(2nd(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(from(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(s(2nd(2nd(2nd(2nd(y0)))))) -> c7(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(s(2nd(2nd(2nd(from(y0)))))) -> c7(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(s(2nd(2nd(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(s(2nd(2nd(2nd(s(y0)))))) -> c7(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(s(2nd(2nd(from(2nd(y0)))))) -> c7(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(s(2nd(2nd(from(from(y0)))))) -> c7(MARK(2nd(2nd(from(from(y0))))))
   MARK(s(2nd(2nd(from(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(s(2nd(2nd(from(s(y0)))))) -> c7(MARK(2nd(2nd(from(s(y0))))))
   MARK(s(2nd(2nd(s(s(y0)))))) -> c7(MARK(2nd(2nd(s(s(y0))))))
   MARK(s(2nd(2nd(s(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(2nd(s(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(s(2nd(2nd(s(2nd(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(s(2nd(2nd(s(2nd(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(s(2nd(2nd(s(from(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(from(s(y0))))))) -> c7(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(from(from(y0))))))) -> c7(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(s(2nd(2nd(s(from(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(s(2nd(2nd(s(from(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(s(2nd(2nd(s(cons(cons(y0, y1), y2)))))) -> c7(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(s(2nd(2nd(s(cons(s(y0), y1)))))) -> c7(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(from(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(s(2nd(from(2nd(2nd(y0)))))) -> c7(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(s(2nd(from(2nd(from(y0)))))) -> c7(MARK(2nd(from(2nd(from(y0))))))
   MARK(s(2nd(from(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(s(2nd(from(2nd(s(y0)))))) -> c7(MARK(2nd(from(2nd(s(y0))))))
   MARK(s(2nd(from(from(2nd(y0)))))) -> c7(MARK(2nd(from(from(2nd(y0))))))
   MARK(s(2nd(from(from(from(y0)))))) -> c7(MARK(2nd(from(from(from(y0))))))
   MARK(s(2nd(from(from(cons(y0, y1)))))) -> c7(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(s(2nd(from(from(s(y0)))))) -> c7(MARK(2nd(from(from(s(y0))))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
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   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
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   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
   A__FROM(s(cons(from(from(2nd(y0))), y1))) -> c2(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__FROM(s(cons(from(from(from(y0))), y1))) -> c2(MARK(s(cons(from(from(from(y0))), y1))))
   A__FROM(s(cons(from(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(from(s(y0))), y1))) -> c2(MARK(s(cons(from(from(s(y0))), y1))))
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   MARK(from(s(from(z0)))) -> c5(A__FROM(s(a__from(mark(z0)))), MARK(s(from(z0))))
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   MARK(from(s(s(z0)))) -> c5(A__FROM(s(s(mark(z0)))), MARK(s(s(z0))))
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   A__FROM(2nd(s(2nd(cons(y0, y1))))) -> c2(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__FROM(2nd(s(2nd(s(y0))))) -> c2(MARK(2nd(s(2nd(s(y0))))))
   A__FROM(2nd(s(2nd(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__FROM(2nd(s(2nd(2nd(from(y0)))))) -> c2(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__FROM(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
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   MARK(s(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(s(2nd(from(2nd(2nd(y0)))))) -> c7(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(s(2nd(from(2nd(from(y0)))))) -> c7(MARK(2nd(from(2nd(from(y0))))))
   MARK(s(2nd(from(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(s(2nd(from(2nd(s(y0)))))) -> c7(MARK(2nd(from(2nd(s(y0))))))
   MARK(s(2nd(from(from(2nd(y0)))))) -> c7(MARK(2nd(from(from(2nd(y0))))))
   MARK(s(2nd(from(from(from(y0)))))) -> c7(MARK(2nd(from(from(from(y0))))))
   MARK(s(2nd(from(from(cons(y0, y1)))))) -> c7(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(s(2nd(from(from(s(y0)))))) -> c7(MARK(2nd(from(from(s(y0))))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(149) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(s(from(cons(y0, y1)))) -> c7(MARK(from(cons(y0, y1)))) by 
   MARK(s(from(cons(2nd(y0), z1)))) -> c7(MARK(from(cons(2nd(y0), z1))))
   MARK(s(from(cons(from(y0), z1)))) -> c7(MARK(from(cons(from(y0), z1))))
   MARK(s(from(cons(cons(y0, y1), z1)))) -> c7(MARK(from(cons(cons(y0, y1), z1))))
   MARK(s(from(cons(s(y0), z1)))) -> c7(MARK(from(cons(s(y0), z1))))

----------------------------------------

(150)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(from(s(y0)), y1)))) -> c4(MARK(s(cons(from(s(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(y0)), y1)))) -> c4(MARK(s(cons(from(2nd(y0)), y1))))
   MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(from(from(y0)), y1)))) -> c4(MARK(s(cons(from(from(y0)), y1))))
   MARK(2nd(s(cons(from(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(from(from(from(y0))), y1)))) -> c4(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(from(from(s(y0))), y1)))) -> c4(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(2nd(2nd(cons(y0, y1)))) -> c4(MARK(2nd(cons(y0, y1))))
   MARK(2nd(2nd(2nd(2nd(y0))))) -> c4(MARK(2nd(2nd(2nd(y0)))))
   MARK(2nd(2nd(2nd(from(y0))))) -> c4(MARK(2nd(2nd(from(y0)))))
   MARK(2nd(2nd(2nd(cons(y0, y1))))) -> c4(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(2nd(2nd(2nd(s(y0))))) -> c4(MARK(2nd(2nd(s(y0)))))
   MARK(2nd(2nd(2nd(y0)))) -> c4(MARK(2nd(2nd(y0))))
   MARK(2nd(2nd(from(2nd(y0))))) -> c4(MARK(2nd(from(2nd(y0)))))
   MARK(2nd(2nd(from(from(y0))))) -> c4(MARK(2nd(from(from(y0)))))
   MARK(2nd(2nd(from(cons(y0, y1))))) -> c4(MARK(2nd(from(cons(y0, y1)))))
   MARK(2nd(2nd(from(s(y0))))) -> c4(MARK(2nd(from(s(y0)))))
   MARK(2nd(2nd(from(y0)))) -> c4(MARK(2nd(from(y0))))
   MARK(2nd(2nd(s(s(y0))))) -> c4(MARK(2nd(s(s(y0)))))
   MARK(2nd(2nd(s(2nd(cons(y0, y1)))))) -> c4(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(2nd(2nd(s(2nd(s(y0)))))) -> c4(MARK(2nd(s(2nd(s(y0))))))
   MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(from(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(2nd(s(y0))))))) -> c4(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(2nd(2nd(s(2nd(2nd(y0)))))) -> c4(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(2nd(2nd(s(2nd(from(2nd(y0))))))) -> c4(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(2nd(2nd(s(2nd(from(from(y0))))))) -> c4(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(2nd(from(s(y0))))))) -> c4(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(2nd(2nd(s(2nd(from(y0)))))) -> c4(MARK(2nd(s(2nd(from(y0))))))
   MARK(2nd(2nd(s(from(cons(y0, y1)))))) -> c4(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(2nd(2nd(s(from(s(y0)))))) -> c4(MARK(2nd(s(from(s(y0))))))
   MARK(2nd(2nd(s(from(2nd(y0)))))) -> c4(MARK(2nd(s(from(2nd(y0))))))
   MARK(2nd(2nd(s(from(2nd(2nd(y0))))))) -> c4(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(2nd(2nd(s(from(2nd(from(y0))))))) -> c4(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(2nd(s(y0))))))) -> c4(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(2nd(2nd(s(from(from(y0)))))) -> c4(MARK(2nd(s(from(from(y0))))))
   MARK(2nd(2nd(s(from(from(2nd(y0))))))) -> c4(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(2nd(2nd(s(from(from(from(y0))))))) -> c4(MARK(2nd(s(from(from(from(y0)))))))
   MARK(2nd(2nd(s(from(from(cons(y0, y1))))))) -> c4(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(2nd(2nd(s(cons(s(y0), y1))))) -> c4(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c4(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
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   MARK(s(2nd(2nd(2nd(2nd(y0)))))) -> c7(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(s(2nd(2nd(2nd(from(y0)))))) -> c7(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(s(2nd(2nd(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(s(2nd(2nd(2nd(s(y0)))))) -> c7(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(s(2nd(2nd(from(2nd(y0)))))) -> c7(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(s(2nd(2nd(from(from(y0)))))) -> c7(MARK(2nd(2nd(from(from(y0))))))
   MARK(s(2nd(2nd(from(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(s(2nd(2nd(from(s(y0)))))) -> c7(MARK(2nd(2nd(from(s(y0))))))
   MARK(s(2nd(2nd(s(s(y0)))))) -> c7(MARK(2nd(2nd(s(s(y0))))))
   MARK(s(2nd(2nd(s(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(2nd(s(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(s(2nd(2nd(s(2nd(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(s(2nd(2nd(s(2nd(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(s(2nd(2nd(s(from(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(from(s(y0))))))) -> c7(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(from(from(y0))))))) -> c7(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(s(2nd(2nd(s(from(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(s(2nd(2nd(s(from(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(s(2nd(2nd(s(cons(cons(y0, y1), y2)))))) -> c7(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(s(2nd(2nd(s(cons(s(y0), y1)))))) -> c7(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(from(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(s(2nd(from(2nd(2nd(y0)))))) -> c7(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(s(2nd(from(2nd(from(y0)))))) -> c7(MARK(2nd(from(2nd(from(y0))))))
   MARK(s(2nd(from(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(s(2nd(from(2nd(s(y0)))))) -> c7(MARK(2nd(from(2nd(s(y0))))))
   MARK(s(2nd(from(from(2nd(y0)))))) -> c7(MARK(2nd(from(from(2nd(y0))))))
   MARK(s(2nd(from(from(from(y0)))))) -> c7(MARK(2nd(from(from(from(y0))))))
   MARK(s(2nd(from(from(cons(y0, y1)))))) -> c7(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(s(2nd(from(from(s(y0)))))) -> c7(MARK(2nd(from(from(s(y0))))))
   MARK(s(from(cons(2nd(y0), z1)))) -> c7(MARK(from(cons(2nd(y0), z1))))
   MARK(s(from(cons(from(y0), z1)))) -> c7(MARK(from(cons(from(y0), z1))))
   MARK(s(from(cons(cons(y0, y1), z1)))) -> c7(MARK(from(cons(cons(y0, y1), z1))))
   MARK(s(from(cons(s(y0), z1)))) -> c7(MARK(from(cons(s(y0), z1))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
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   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
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   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
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   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
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   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
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   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
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   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
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   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(from(from(y0))), y1))) -> c2(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__FROM(s(cons(2nd(from(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(from(s(y0))), y1))) -> c2(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__FROM(s(cons(2nd(from(y0)), y1))) -> c2(MARK(s(cons(2nd(from(y0)), y1))))
   A__FROM(s(cons(from(cons(y0, y1)), y2))) -> c2(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__FROM(s(cons(from(s(y0)), y1))) -> c2(MARK(s(cons(from(s(y0)), y1))))
   A__FROM(s(cons(from(2nd(y0)), y1))) -> c2(MARK(s(cons(from(2nd(y0)), y1))))
   A__FROM(s(cons(from(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(from(2nd(from(y0))), y1))) -> c2(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__FROM(s(cons(from(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(from(2nd(s(y0))), y1))) -> c2(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__FROM(s(cons(from(from(y0)), y1))) -> c2(MARK(s(cons(from(from(y0)), y1))))
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   A__FROM(2nd(s(2nd(from(2nd(y0)))))) -> c2(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__FROM(2nd(s(2nd(from(from(y0)))))) -> c2(MARK(2nd(s(2nd(from(from(y0)))))))
   A__FROM(2nd(s(2nd(from(cons(y0, y1)))))) -> c2(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__FROM(2nd(s(2nd(from(s(y0)))))) -> c2(MARK(2nd(s(2nd(from(s(y0)))))))
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   A__FROM(2nd(s(from(s(y0))))) -> c2(MARK(2nd(s(from(s(y0))))))
   A__FROM(2nd(s(from(2nd(y0))))) -> c2(MARK(2nd(s(from(2nd(y0))))))
   A__FROM(2nd(s(from(2nd(2nd(y0)))))) -> c2(MARK(2nd(s(from(2nd(2nd(y0)))))))
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   MARK(s(s(cons(from(2nd(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   MARK(s(s(cons(from(2nd(s(y0))), y1)))) -> c7(MARK(s(cons(from(2nd(s(y0))), y1))))
   MARK(s(s(cons(from(from(y0)), y1)))) -> c7(MARK(s(cons(from(from(y0)), y1))))
   MARK(s(s(cons(from(from(2nd(y0))), y1)))) -> c7(MARK(s(cons(from(from(2nd(y0))), y1))))
   MARK(s(s(cons(from(from(from(y0))), y1)))) -> c7(MARK(s(cons(from(from(from(y0))), y1))))
   MARK(s(s(cons(from(from(cons(y0, y1))), y2)))) -> c7(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   MARK(s(s(cons(from(from(s(y0))), y1)))) -> c7(MARK(s(cons(from(from(s(y0))), y1))))
   MARK(s(2nd(s(s(y0))))) -> c7(MARK(2nd(s(s(y0)))))
   MARK(s(2nd(s(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(s(2nd(cons(y0, y1))))))
   MARK(s(2nd(s(2nd(s(y0)))))) -> c7(MARK(2nd(s(2nd(s(y0))))))
   MARK(s(2nd(s(2nd(2nd(2nd(y0))))))) -> c7(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   MARK(s(2nd(s(2nd(2nd(from(y0))))))) -> c7(MARK(2nd(s(2nd(2nd(from(y0)))))))
   MARK(s(2nd(s(2nd(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   MARK(s(2nd(s(2nd(2nd(s(y0))))))) -> c7(MARK(2nd(s(2nd(2nd(s(y0)))))))
   MARK(s(2nd(s(2nd(2nd(y0)))))) -> c7(MARK(2nd(s(2nd(2nd(y0))))))
   MARK(s(2nd(s(2nd(from(2nd(y0))))))) -> c7(MARK(2nd(s(2nd(from(2nd(y0)))))))
   MARK(s(2nd(s(2nd(from(from(y0))))))) -> c7(MARK(2nd(s(2nd(from(from(y0)))))))
   MARK(s(2nd(s(2nd(from(cons(y0, y1))))))) -> c7(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   MARK(s(2nd(s(2nd(from(s(y0))))))) -> c7(MARK(2nd(s(2nd(from(s(y0)))))))
   MARK(s(2nd(s(2nd(from(y0)))))) -> c7(MARK(2nd(s(2nd(from(y0))))))
   MARK(s(2nd(s(from(cons(y0, y1)))))) -> c7(MARK(2nd(s(from(cons(y0, y1))))))
   MARK(s(2nd(s(from(s(y0)))))) -> c7(MARK(2nd(s(from(s(y0))))))
   MARK(s(2nd(s(from(2nd(y0)))))) -> c7(MARK(2nd(s(from(2nd(y0))))))
   MARK(s(2nd(s(from(2nd(2nd(y0))))))) -> c7(MARK(2nd(s(from(2nd(2nd(y0)))))))
   MARK(s(2nd(s(from(2nd(from(y0))))))) -> c7(MARK(2nd(s(from(2nd(from(y0)))))))
   MARK(s(2nd(s(from(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   MARK(s(2nd(s(from(2nd(s(y0))))))) -> c7(MARK(2nd(s(from(2nd(s(y0)))))))
   MARK(s(2nd(s(from(from(y0)))))) -> c7(MARK(2nd(s(from(from(y0))))))
   MARK(s(2nd(s(from(from(2nd(y0))))))) -> c7(MARK(2nd(s(from(from(2nd(y0)))))))
   MARK(s(2nd(s(from(from(from(y0))))))) -> c7(MARK(2nd(s(from(from(from(y0)))))))
   MARK(s(2nd(s(from(from(cons(y0, y1))))))) -> c7(MARK(2nd(s(from(from(cons(y0, y1)))))))
   MARK(s(2nd(s(from(from(s(y0))))))) -> c7(MARK(2nd(s(from(from(s(y0)))))))
   MARK(s(2nd(s(cons(cons(y0, y1), y2))))) -> c7(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   MARK(s(2nd(s(cons(s(y0), y1))))) -> c7(MARK(2nd(s(cons(s(y0), y1)))))
   MARK(s(2nd(s(cons(2nd(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(2nd(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(from(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(s(2nd(2nd(2nd(2nd(y0)))))) -> c7(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(s(2nd(2nd(2nd(from(y0)))))) -> c7(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(s(2nd(2nd(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(s(2nd(2nd(2nd(s(y0)))))) -> c7(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(s(2nd(2nd(from(2nd(y0)))))) -> c7(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(s(2nd(2nd(from(from(y0)))))) -> c7(MARK(2nd(2nd(from(from(y0))))))
   MARK(s(2nd(2nd(from(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(s(2nd(2nd(from(s(y0)))))) -> c7(MARK(2nd(2nd(from(s(y0))))))
   MARK(s(2nd(2nd(s(s(y0)))))) -> c7(MARK(2nd(2nd(s(s(y0))))))
   MARK(s(2nd(2nd(s(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(2nd(s(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(s(2nd(2nd(s(2nd(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(s(2nd(2nd(s(2nd(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(s(2nd(2nd(s(from(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(from(s(y0))))))) -> c7(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(from(from(y0))))))) -> c7(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(s(2nd(2nd(s(from(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(s(2nd(2nd(s(from(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(s(2nd(2nd(s(cons(cons(y0, y1), y2)))))) -> c7(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(s(2nd(2nd(s(cons(s(y0), y1)))))) -> c7(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(from(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(s(2nd(from(2nd(2nd(y0)))))) -> c7(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(s(2nd(from(2nd(from(y0)))))) -> c7(MARK(2nd(from(2nd(from(y0))))))
   MARK(s(2nd(from(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(s(2nd(from(2nd(s(y0)))))) -> c7(MARK(2nd(from(2nd(s(y0))))))
   MARK(s(2nd(from(from(2nd(y0)))))) -> c7(MARK(2nd(from(from(2nd(y0))))))
   MARK(s(2nd(from(from(from(y0)))))) -> c7(MARK(2nd(from(from(from(y0))))))
   MARK(s(2nd(from(from(cons(y0, y1)))))) -> c7(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(s(2nd(from(from(s(y0)))))) -> c7(MARK(2nd(from(from(s(y0))))))
   MARK(s(from(cons(2nd(y0), z1)))) -> c7(MARK(from(cons(2nd(y0), z1))))
   MARK(s(from(cons(from(y0), z1)))) -> c7(MARK(from(cons(from(y0), z1))))
   MARK(s(from(cons(cons(y0, y1), z1)))) -> c7(MARK(from(cons(cons(y0, y1), z1))))
   MARK(s(from(cons(s(y0), z1)))) -> c7(MARK(from(cons(s(y0), z1))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1


----------------------------------------

(151) CdtForwardInstantiationProof (BOTH BOUNDS(ID, ID))
Use forward instantiation to replace MARK(s(from(s(y0)))) -> c7(MARK(from(s(y0)))) by 
   MARK(s(from(s(2nd(y0))))) -> c7(MARK(from(s(2nd(y0)))))
   MARK(s(from(s(from(y0))))) -> c7(MARK(from(s(from(y0)))))
   MARK(s(from(s(cons(y0, y1))))) -> c7(MARK(from(s(cons(y0, y1)))))
   MARK(s(from(s(s(y0))))) -> c7(MARK(from(s(s(y0)))))

----------------------------------------

(152)
Obligation:
Complexity Dependency Tuples Problem

Rules:
   a__2nd(cons(z0, cons(z1, z2))) -> mark(z1)
   a__2nd(z0) -> 2nd(z0)
   a__from(z0) -> cons(mark(z0), from(s(z0)))
   a__from(z0) -> from(z0)
   mark(2nd(z0)) -> a__2nd(mark(z0))
   mark(from(z0)) -> a__from(mark(z0))
   mark(cons(z0, z1)) -> cons(mark(z0), z1)
   mark(s(z0)) -> s(mark(z0))
Tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
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   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(2nd(from(cons(y0, y1)))) -> c4(MARK(from(cons(y0, y1))))
   MARK(2nd(from(s(y0)))) -> c4(MARK(from(s(y0))))
   MARK(2nd(from(2nd(y0)))) -> c4(MARK(from(2nd(y0))))
   MARK(2nd(from(2nd(2nd(y0))))) -> c4(MARK(from(2nd(2nd(y0)))))
   MARK(2nd(from(2nd(from(y0))))) -> c4(MARK(from(2nd(from(y0)))))
   MARK(2nd(from(2nd(cons(y0, y1))))) -> c4(MARK(from(2nd(cons(y0, y1)))))
   MARK(2nd(from(2nd(s(y0))))) -> c4(MARK(from(2nd(s(y0)))))
   MARK(2nd(from(from(y0)))) -> c4(MARK(from(from(y0))))
   MARK(2nd(from(from(2nd(y0))))) -> c4(MARK(from(from(2nd(y0)))))
   MARK(2nd(from(from(from(y0))))) -> c4(MARK(from(from(from(y0)))))
   MARK(2nd(from(from(cons(y0, y1))))) -> c4(MARK(from(from(cons(y0, y1)))))
   MARK(2nd(from(from(s(y0))))) -> c4(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(from(cons(y0, y1)), z2))) -> c(MARK(from(cons(y0, y1))))
   A__2ND(cons(z0, cons(from(s(y0)), z2))) -> c(MARK(from(s(y0))))
   A__2ND(cons(z0, cons(from(2nd(y0)), z2))) -> c(MARK(from(2nd(y0))))
   A__2ND(cons(z0, cons(from(2nd(2nd(y0))), z2))) -> c(MARK(from(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
   A__2ND(cons(z0, cons(from(from(2nd(y0))), z2))) -> c(MARK(from(from(2nd(y0)))))
   A__2ND(cons(z0, cons(from(from(from(y0))), z2))) -> c(MARK(from(from(from(y0)))))
   A__2ND(cons(z0, cons(from(from(cons(y0, y1))), z2))) -> c(MARK(from(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(from(s(y0))), z2))) -> c(MARK(from(from(s(y0)))))
   A__2ND(cons(z0, cons(cons(cons(y0, y1), z2), z3))) -> c(MARK(cons(cons(y0, y1), z2)))
   A__2ND(cons(z0, cons(cons(s(y0), z2), z3))) -> c(MARK(cons(s(y0), z2)))
   A__2ND(cons(z0, cons(cons(2nd(cons(y0, y1)), z2), z3))) -> c(MARK(cons(2nd(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(s(y0)), z2), z3))) -> c(MARK(cons(2nd(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(from(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(s(y0))), z2), z3))) -> c(MARK(cons(2nd(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(2nd(y0)), z2), z3))) -> c(MARK(cons(2nd(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(2nd(y0))), z2), z3))) -> c(MARK(cons(2nd(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(from(y0))), z2), z3))) -> c(MARK(cons(2nd(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(2nd(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(s(y0))), z2), z3))) -> c(MARK(cons(2nd(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(2nd(from(y0)), z2), z3))) -> c(MARK(cons(2nd(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(cons(y0, y1)), z2), z3))) -> c(MARK(cons(from(cons(y0, y1)), z2)))
   A__2ND(cons(z0, cons(cons(from(s(y0)), z2), z3))) -> c(MARK(cons(from(s(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(y0)), z2), z3))) -> c(MARK(cons(from(2nd(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(2nd(y0))), z2), z3))) -> c(MARK(cons(from(2nd(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(from(y0))), z2), z3))) -> c(MARK(cons(from(2nd(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(2nd(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(2nd(s(y0))), z2), z3))) -> c(MARK(cons(from(2nd(s(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(y0)), z2), z3))) -> c(MARK(cons(from(from(y0)), z2)))
   A__2ND(cons(z0, cons(cons(from(from(2nd(y0))), z2), z3))) -> c(MARK(cons(from(from(2nd(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(from(y0))), z2), z3))) -> c(MARK(cons(from(from(from(y0))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(cons(y0, y1))), z2), z3))) -> c(MARK(cons(from(from(cons(y0, y1))), z2)))
   A__2ND(cons(z0, cons(cons(from(from(s(y0))), z2), z3))) -> c(MARK(cons(from(from(s(y0))), z2)))
   A__2ND(cons(z0, cons(s(s(y0)), z2))) -> c(MARK(s(s(y0))))
   A__2ND(cons(z0, cons(s(2nd(cons(y0, y1))), z2))) -> c(MARK(s(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(2nd(s(y0))), z2))) -> c(MARK(s(2nd(s(y0)))))
   A__2ND(cons(z0, cons(s(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(s(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(from(y0)))), z2))) -> c(MARK(s(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(s(y0)))), z2))) -> c(MARK(s(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(2nd(y0))), z2))) -> c(MARK(s(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(s(2nd(from(2nd(y0)))), z2))) -> c(MARK(s(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(from(y0)))), z2))) -> c(MARK(s(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(s(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(2nd(from(s(y0)))), z2))) -> c(MARK(s(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(s(2nd(from(y0))), z2))) -> c(MARK(s(2nd(from(y0)))))
   A__2ND(cons(z0, cons(s(from(cons(y0, y1))), z2))) -> c(MARK(s(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(s(from(s(y0))), z2))) -> c(MARK(s(from(s(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(y0))), z2))) -> c(MARK(s(from(2nd(y0)))))
   A__2ND(cons(z0, cons(s(from(2nd(2nd(y0)))), z2))) -> c(MARK(s(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(from(y0)))), z2))) -> c(MARK(s(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(s(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(s(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(2nd(s(y0)))), z2))) -> c(MARK(s(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(s(from(from(y0))), z2))) -> c(MARK(s(from(from(y0)))))
   A__2ND(cons(z0, cons(s(from(from(2nd(y0)))), z2))) -> c(MARK(s(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(s(from(from(from(y0)))), z2))) -> c(MARK(s(from(from(from(y0))))))
   A__2ND(cons(z0, cons(s(from(from(cons(y0, y1)))), z2))) -> c(MARK(s(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(s(from(from(s(y0)))), z2))) -> c(MARK(s(from(from(s(y0))))))
   A__2ND(cons(z0, cons(s(cons(cons(y0, y1), y2)), z2))) -> c(MARK(s(cons(cons(y0, y1), y2))))
   A__2ND(cons(z0, cons(s(cons(s(y0), y1)), z2))) -> c(MARK(s(cons(s(y0), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(s(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
   A__FROM(from(2nd(cons(y0, y1)))) -> c2(MARK(from(2nd(cons(y0, y1)))))
   A__FROM(from(2nd(s(y0)))) -> c2(MARK(from(2nd(s(y0)))))
   A__FROM(from(from(y0))) -> c2(MARK(from(from(y0))))
   A__FROM(from(from(2nd(y0)))) -> c2(MARK(from(from(2nd(y0)))))
   A__FROM(from(from(from(y0)))) -> c2(MARK(from(from(from(y0)))))
   A__FROM(from(from(cons(y0, y1)))) -> c2(MARK(from(from(cons(y0, y1)))))
   A__FROM(from(from(s(y0)))) -> c2(MARK(from(from(s(y0)))))
   A__FROM(cons(cons(y0, y1), z1)) -> c2(MARK(cons(cons(y0, y1), z1)))
   A__FROM(cons(s(y0), z1)) -> c2(MARK(cons(s(y0), z1)))
   A__FROM(cons(2nd(cons(y0, y1)), z1)) -> c2(MARK(cons(2nd(cons(y0, y1)), z1)))
   A__FROM(cons(2nd(s(y0)), z1)) -> c2(MARK(cons(2nd(s(y0)), z1)))
   A__FROM(cons(2nd(2nd(2nd(y0))), z1)) -> c2(MARK(cons(2nd(2nd(2nd(y0))), z1)))
   A__FROM(cons(2nd(2nd(from(y0))), z1)) -> c2(MARK(cons(2nd(2nd(from(y0))), z1)))
   A__FROM(cons(2nd(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(2nd(s(y0))), z1)) -> c2(MARK(cons(2nd(2nd(s(y0))), z1)))
   A__FROM(cons(2nd(2nd(y0)), z1)) -> c2(MARK(cons(2nd(2nd(y0)), z1)))
   A__FROM(cons(2nd(from(2nd(y0))), z1)) -> c2(MARK(cons(2nd(from(2nd(y0))), z1)))
   A__FROM(cons(2nd(from(from(y0))), z1)) -> c2(MARK(cons(2nd(from(from(y0))), z1)))
   A__FROM(cons(2nd(from(cons(y0, y1))), z1)) -> c2(MARK(cons(2nd(from(cons(y0, y1))), z1)))
   A__FROM(cons(2nd(from(s(y0))), z1)) -> c2(MARK(cons(2nd(from(s(y0))), z1)))
   A__FROM(cons(2nd(from(y0)), z1)) -> c2(MARK(cons(2nd(from(y0)), z1)))
   A__FROM(cons(from(cons(y0, y1)), z1)) -> c2(MARK(cons(from(cons(y0, y1)), z1)))
   A__FROM(cons(from(s(y0)), z1)) -> c2(MARK(cons(from(s(y0)), z1)))
   A__FROM(cons(from(2nd(y0)), z1)) -> c2(MARK(cons(from(2nd(y0)), z1)))
   A__FROM(cons(from(2nd(2nd(y0))), z1)) -> c2(MARK(cons(from(2nd(2nd(y0))), z1)))
   A__FROM(cons(from(2nd(from(y0))), z1)) -> c2(MARK(cons(from(2nd(from(y0))), z1)))
   A__FROM(cons(from(2nd(cons(y0, y1))), z1)) -> c2(MARK(cons(from(2nd(cons(y0, y1))), z1)))
   A__FROM(cons(from(2nd(s(y0))), z1)) -> c2(MARK(cons(from(2nd(s(y0))), z1)))
   A__FROM(cons(from(from(y0)), z1)) -> c2(MARK(cons(from(from(y0)), z1)))
   A__FROM(cons(from(from(2nd(y0))), z1)) -> c2(MARK(cons(from(from(2nd(y0))), z1)))
   A__FROM(cons(from(from(from(y0))), z1)) -> c2(MARK(cons(from(from(from(y0))), z1)))
   A__FROM(cons(from(from(cons(y0, y1))), z1)) -> c2(MARK(cons(from(from(cons(y0, y1))), z1)))
   A__FROM(cons(from(from(s(y0))), z1)) -> c2(MARK(cons(from(from(s(y0))), z1)))
   MARK(from(cons(2nd(z0), x1))) -> c5(A__FROM(cons(a__2nd(mark(z0)), x1)), MARK(cons(2nd(z0), x1)))
   MARK(from(cons(from(z0), x1))) -> c5(A__FROM(cons(a__from(mark(z0)), x1)), MARK(cons(from(z0), x1)))
   MARK(from(cons(cons(z0, z1), x1))) -> c5(A__FROM(cons(cons(mark(z0), z1), x1)), MARK(cons(cons(z0, z1), x1)))
   MARK(from(cons(s(z0), x1))) -> c5(A__FROM(cons(s(mark(z0)), x1)), MARK(cons(s(z0), x1)))
   A__FROM(s(s(y0))) -> c2(MARK(s(s(y0))))
   A__FROM(s(2nd(cons(y0, y1)))) -> c2(MARK(s(2nd(cons(y0, y1)))))
   A__FROM(s(2nd(s(y0)))) -> c2(MARK(s(2nd(s(y0)))))
   A__FROM(s(2nd(2nd(2nd(y0))))) -> c2(MARK(s(2nd(2nd(2nd(y0))))))
   A__FROM(s(2nd(2nd(from(y0))))) -> c2(MARK(s(2nd(2nd(from(y0))))))
   A__FROM(s(2nd(2nd(cons(y0, y1))))) -> c2(MARK(s(2nd(2nd(cons(y0, y1))))))
   A__FROM(s(2nd(2nd(s(y0))))) -> c2(MARK(s(2nd(2nd(s(y0))))))
   A__FROM(s(2nd(2nd(y0)))) -> c2(MARK(s(2nd(2nd(y0)))))
   A__FROM(s(2nd(from(2nd(y0))))) -> c2(MARK(s(2nd(from(2nd(y0))))))
   A__FROM(s(2nd(from(from(y0))))) -> c2(MARK(s(2nd(from(from(y0))))))
   A__FROM(s(2nd(from(cons(y0, y1))))) -> c2(MARK(s(2nd(from(cons(y0, y1))))))
   A__FROM(s(2nd(from(s(y0))))) -> c2(MARK(s(2nd(from(s(y0))))))
   A__FROM(s(2nd(from(y0)))) -> c2(MARK(s(2nd(from(y0)))))
   A__FROM(s(from(cons(y0, y1)))) -> c2(MARK(s(from(cons(y0, y1)))))
   A__FROM(s(from(s(y0)))) -> c2(MARK(s(from(s(y0)))))
   A__FROM(s(from(2nd(y0)))) -> c2(MARK(s(from(2nd(y0)))))
   A__FROM(s(from(2nd(2nd(y0))))) -> c2(MARK(s(from(2nd(2nd(y0))))))
   A__FROM(s(from(2nd(from(y0))))) -> c2(MARK(s(from(2nd(from(y0))))))
   A__FROM(s(from(2nd(cons(y0, y1))))) -> c2(MARK(s(from(2nd(cons(y0, y1))))))
   A__FROM(s(from(2nd(s(y0))))) -> c2(MARK(s(from(2nd(s(y0))))))
   A__FROM(s(from(from(y0)))) -> c2(MARK(s(from(from(y0)))))
   A__FROM(s(from(from(2nd(y0))))) -> c2(MARK(s(from(from(2nd(y0))))))
   A__FROM(s(from(from(from(y0))))) -> c2(MARK(s(from(from(from(y0))))))
   A__FROM(s(from(from(cons(y0, y1))))) -> c2(MARK(s(from(from(cons(y0, y1))))))
   A__FROM(s(from(from(s(y0))))) -> c2(MARK(s(from(from(s(y0))))))
   A__FROM(s(cons(cons(y0, y1), y2))) -> c2(MARK(s(cons(cons(y0, y1), y2))))
   A__FROM(s(cons(s(y0), y1))) -> c2(MARK(s(cons(s(y0), y1))))
   A__FROM(s(cons(2nd(cons(y0, y1)), y2))) -> c2(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   A__FROM(s(cons(2nd(s(y0)), y1))) -> c2(MARK(s(cons(2nd(s(y0)), y1))))
   A__FROM(s(cons(2nd(2nd(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(from(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c2(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   A__FROM(s(cons(2nd(2nd(s(y0))), y1))) -> c2(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   A__FROM(s(cons(2nd(2nd(y0)), y1))) -> c2(MARK(s(cons(2nd(2nd(y0)), y1))))
   A__FROM(s(cons(2nd(from(2nd(y0))), y1))) -> c2(MARK(s(cons(2nd(from(2nd(y0))), y1))))
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   MARK(s(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(from(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(s(2nd(from(2nd(2nd(y0)))))) -> c7(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(s(2nd(from(2nd(from(y0)))))) -> c7(MARK(2nd(from(2nd(from(y0))))))
   MARK(s(2nd(from(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(s(2nd(from(2nd(s(y0)))))) -> c7(MARK(2nd(from(2nd(s(y0))))))
   MARK(s(2nd(from(from(2nd(y0)))))) -> c7(MARK(2nd(from(from(2nd(y0))))))
   MARK(s(2nd(from(from(from(y0)))))) -> c7(MARK(2nd(from(from(from(y0))))))
   MARK(s(2nd(from(from(cons(y0, y1)))))) -> c7(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(s(2nd(from(from(s(y0)))))) -> c7(MARK(2nd(from(from(s(y0))))))
   MARK(s(from(cons(2nd(y0), z1)))) -> c7(MARK(from(cons(2nd(y0), z1))))
   MARK(s(from(cons(from(y0), z1)))) -> c7(MARK(from(cons(from(y0), z1))))
   MARK(s(from(cons(cons(y0, y1), z1)))) -> c7(MARK(from(cons(cons(y0, y1), z1))))
   MARK(s(from(cons(s(y0), z1)))) -> c7(MARK(from(cons(s(y0), z1))))
   MARK(s(from(s(2nd(y0))))) -> c7(MARK(from(s(2nd(y0)))))
   MARK(s(from(s(from(y0))))) -> c7(MARK(from(s(from(y0)))))
   MARK(s(from(s(cons(y0, y1))))) -> c7(MARK(from(s(cons(y0, y1)))))
   MARK(s(from(s(s(y0))))) -> c7(MARK(from(s(s(y0)))))
S tuples:
   MARK(2nd(cons(z0, z1))) -> c4(A__2ND(cons(mark(z0), z1)), MARK(cons(z0, z1)))
   MARK(2nd(2nd(2nd(z0)))) -> c4(A__2ND(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(2nd(2nd(from(z0)))) -> c4(A__2ND(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(2nd(2nd(cons(z0, z1)))) -> c4(A__2ND(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(2nd(2nd(s(z0)))) -> c4(A__2ND(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(2nd(from(2nd(z0)))) -> c4(A__2ND(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(2nd(from(from(z0)))) -> c4(A__2ND(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(2nd(from(cons(z0, z1)))) -> c4(A__2ND(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(2nd(from(s(z0)))) -> c4(A__2ND(a__from(s(mark(z0)))), MARK(from(s(z0))))
   A__2ND(cons(z0, cons(2nd(cons(y0, y1)), z2))) -> c(MARK(2nd(cons(y0, y1))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(y0))), z2))) -> c(MARK(2nd(2nd(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(from(y0))), z2))) -> c(MARK(2nd(2nd(from(y0)))))
   A__2ND(cons(z0, cons(2nd(2nd(cons(y0, y1))), z2))) -> c(MARK(2nd(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(s(y0))), z2))) -> c(MARK(2nd(2nd(s(y0)))))
   A__2ND(cons(z0, cons(2nd(from(2nd(y0))), z2))) -> c(MARK(2nd(from(2nd(y0)))))
   A__2ND(cons(z0, cons(2nd(from(from(y0))), z2))) -> c(MARK(2nd(from(from(y0)))))
   A__2ND(cons(z0, cons(2nd(from(cons(y0, y1))), z2))) -> c(MARK(2nd(from(cons(y0, y1)))))
   A__2ND(cons(z0, cons(2nd(from(s(y0))), z2))) -> c(MARK(2nd(from(s(y0)))))
   A__FROM(2nd(cons(y0, y1))) -> c2(MARK(2nd(cons(y0, y1))))
   A__FROM(2nd(2nd(2nd(y0)))) -> c2(MARK(2nd(2nd(2nd(y0)))))
   A__FROM(2nd(2nd(from(y0)))) -> c2(MARK(2nd(2nd(from(y0)))))
   A__FROM(2nd(2nd(cons(y0, y1)))) -> c2(MARK(2nd(2nd(cons(y0, y1)))))
   A__FROM(2nd(2nd(s(y0)))) -> c2(MARK(2nd(2nd(s(y0)))))
   A__FROM(2nd(from(2nd(y0)))) -> c2(MARK(2nd(from(2nd(y0)))))
   A__FROM(2nd(from(from(y0)))) -> c2(MARK(2nd(from(from(y0)))))
   A__FROM(2nd(from(cons(y0, y1)))) -> c2(MARK(2nd(from(cons(y0, y1)))))
   A__FROM(2nd(from(s(y0)))) -> c2(MARK(2nd(from(s(y0)))))
   MARK(from(2nd(x0))) -> c5(A__FROM(2nd(mark(x0))), MARK(2nd(x0)))
   MARK(from(2nd(2nd(z0)))) -> c5(A__FROM(a__2nd(a__2nd(mark(z0)))), MARK(2nd(2nd(z0))))
   MARK(from(2nd(from(z0)))) -> c5(A__FROM(a__2nd(a__from(mark(z0)))), MARK(2nd(from(z0))))
   MARK(from(2nd(cons(z0, z1)))) -> c5(A__FROM(a__2nd(cons(mark(z0), z1))), MARK(2nd(cons(z0, z1))))
   MARK(from(2nd(s(z0)))) -> c5(A__FROM(a__2nd(s(mark(z0)))), MARK(2nd(s(z0))))
   MARK(from(from(x0))) -> c5(A__FROM(cons(mark(mark(x0)), from(s(mark(x0))))), MARK(from(x0)))
   MARK(from(from(x0))) -> c5(A__FROM(from(mark(x0))), MARK(from(x0)))
   MARK(from(from(2nd(z0)))) -> c5(A__FROM(a__from(a__2nd(mark(z0)))), MARK(from(2nd(z0))))
   MARK(from(from(from(z0)))) -> c5(A__FROM(a__from(a__from(mark(z0)))), MARK(from(from(z0))))
   MARK(from(from(cons(z0, z1)))) -> c5(A__FROM(a__from(cons(mark(z0), z1))), MARK(from(cons(z0, z1))))
   MARK(from(from(s(z0)))) -> c5(A__FROM(a__from(s(mark(z0)))), MARK(from(s(z0))))
   MARK(cons(2nd(cons(y0, y1)), z1)) -> c6(MARK(2nd(cons(y0, y1))))
   MARK(cons(2nd(2nd(2nd(y0))), z1)) -> c6(MARK(2nd(2nd(2nd(y0)))))
   MARK(cons(2nd(2nd(from(y0))), z1)) -> c6(MARK(2nd(2nd(from(y0)))))
   MARK(cons(2nd(2nd(cons(y0, y1))), z1)) -> c6(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(cons(2nd(2nd(s(y0))), z1)) -> c6(MARK(2nd(2nd(s(y0)))))
   MARK(cons(2nd(from(2nd(y0))), z1)) -> c6(MARK(2nd(from(2nd(y0)))))
   MARK(cons(2nd(from(from(y0))), z1)) -> c6(MARK(2nd(from(from(y0)))))
   MARK(cons(2nd(from(cons(y0, y1))), z1)) -> c6(MARK(2nd(from(cons(y0, y1)))))
   MARK(cons(2nd(from(s(y0))), z1)) -> c6(MARK(2nd(from(s(y0)))))
   MARK(cons(from(2nd(y0)), z1)) -> c6(MARK(from(2nd(y0))))
   MARK(cons(from(2nd(2nd(y0))), z1)) -> c6(MARK(from(2nd(2nd(y0)))))
   MARK(cons(from(2nd(from(y0))), z1)) -> c6(MARK(from(2nd(from(y0)))))
   MARK(cons(from(2nd(cons(y0, y1))), z1)) -> c6(MARK(from(2nd(cons(y0, y1)))))
   MARK(cons(from(2nd(s(y0))), z1)) -> c6(MARK(from(2nd(s(y0)))))
   MARK(cons(from(from(y0)), z1)) -> c6(MARK(from(from(y0))))
   MARK(cons(from(from(2nd(y0))), z1)) -> c6(MARK(from(from(2nd(y0)))))
   MARK(cons(from(from(from(y0))), z1)) -> c6(MARK(from(from(from(y0)))))
   MARK(cons(from(from(cons(y0, y1))), z1)) -> c6(MARK(from(from(cons(y0, y1)))))
   MARK(cons(from(from(s(y0))), z1)) -> c6(MARK(from(from(s(y0)))))
   MARK(s(2nd(cons(y0, y1)))) -> c7(MARK(2nd(cons(y0, y1))))
   MARK(s(2nd(2nd(2nd(y0))))) -> c7(MARK(2nd(2nd(2nd(y0)))))
   MARK(s(2nd(2nd(from(y0))))) -> c7(MARK(2nd(2nd(from(y0)))))
   MARK(s(2nd(2nd(cons(y0, y1))))) -> c7(MARK(2nd(2nd(cons(y0, y1)))))
   MARK(s(2nd(2nd(s(y0))))) -> c7(MARK(2nd(2nd(s(y0)))))
   MARK(s(2nd(from(2nd(y0))))) -> c7(MARK(2nd(from(2nd(y0)))))
   MARK(s(2nd(from(from(y0))))) -> c7(MARK(2nd(from(from(y0)))))
   MARK(s(2nd(from(cons(y0, y1))))) -> c7(MARK(2nd(from(cons(y0, y1)))))
   MARK(s(2nd(from(s(y0))))) -> c7(MARK(2nd(from(s(y0)))))
   MARK(s(from(2nd(y0)))) -> c7(MARK(from(2nd(y0))))
   MARK(s(from(2nd(2nd(y0))))) -> c7(MARK(from(2nd(2nd(y0)))))
   MARK(s(from(2nd(from(y0))))) -> c7(MARK(from(2nd(from(y0)))))
   MARK(s(from(2nd(cons(y0, y1))))) -> c7(MARK(from(2nd(cons(y0, y1)))))
   MARK(s(from(2nd(s(y0))))) -> c7(MARK(from(2nd(s(y0)))))
   MARK(s(from(from(y0)))) -> c7(MARK(from(from(y0))))
   MARK(s(from(from(2nd(y0))))) -> c7(MARK(from(from(2nd(y0)))))
   MARK(s(from(from(from(y0))))) -> c7(MARK(from(from(from(y0)))))
   MARK(s(from(from(cons(y0, y1))))) -> c7(MARK(from(from(cons(y0, y1)))))
   MARK(s(from(from(s(y0))))) -> c7(MARK(from(from(s(y0)))))
   MARK(s(cons(cons(y0, y1), y2))) -> c7(MARK(cons(cons(y0, y1), y2)))
   MARK(s(cons(s(y0), y1))) -> c7(MARK(cons(s(y0), y1)))
   MARK(s(cons(2nd(cons(y0, y1)), y2))) -> c7(MARK(cons(2nd(cons(y0, y1)), y2)))
   MARK(s(cons(2nd(s(y0)), y1))) -> c7(MARK(cons(2nd(s(y0)), y1)))
   MARK(s(cons(2nd(2nd(2nd(y0))), y1))) -> c7(MARK(cons(2nd(2nd(2nd(y0))), y1)))
   MARK(s(cons(2nd(2nd(from(y0))), y1))) -> c7(MARK(cons(2nd(2nd(from(y0))), y1)))
   MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(2nd(s(y0))), y1))) -> c7(MARK(cons(2nd(2nd(s(y0))), y1)))
   MARK(s(cons(2nd(2nd(y0)), y1))) -> c7(MARK(cons(2nd(2nd(y0)), y1)))
   MARK(s(cons(2nd(from(2nd(y0))), y1))) -> c7(MARK(cons(2nd(from(2nd(y0))), y1)))
   MARK(s(cons(2nd(from(from(y0))), y1))) -> c7(MARK(cons(2nd(from(from(y0))), y1)))
   MARK(s(cons(2nd(from(cons(y0, y1))), y2))) -> c7(MARK(cons(2nd(from(cons(y0, y1))), y2)))
   MARK(s(cons(2nd(from(s(y0))), y1))) -> c7(MARK(cons(2nd(from(s(y0))), y1)))
   MARK(s(cons(2nd(from(y0)), y1))) -> c7(MARK(cons(2nd(from(y0)), y1)))
   MARK(s(cons(from(cons(y0, y1)), y2))) -> c7(MARK(cons(from(cons(y0, y1)), y2)))
   MARK(s(cons(from(s(y0)), y1))) -> c7(MARK(cons(from(s(y0)), y1)))
   MARK(s(cons(from(2nd(y0)), y1))) -> c7(MARK(cons(from(2nd(y0)), y1)))
   MARK(s(cons(from(2nd(2nd(y0))), y1))) -> c7(MARK(cons(from(2nd(2nd(y0))), y1)))
   MARK(s(cons(from(2nd(from(y0))), y1))) -> c7(MARK(cons(from(2nd(from(y0))), y1)))
   MARK(s(cons(from(2nd(cons(y0, y1))), y2))) -> c7(MARK(cons(from(2nd(cons(y0, y1))), y2)))
   MARK(s(cons(from(2nd(s(y0))), y1))) -> c7(MARK(cons(from(2nd(s(y0))), y1)))
   MARK(s(cons(from(from(y0)), y1))) -> c7(MARK(cons(from(from(y0)), y1)))
   MARK(s(cons(from(from(2nd(y0))), y1))) -> c7(MARK(cons(from(from(2nd(y0))), y1)))
   MARK(s(cons(from(from(from(y0))), y1))) -> c7(MARK(cons(from(from(from(y0))), y1)))
   MARK(s(cons(from(from(cons(y0, y1))), y2))) -> c7(MARK(cons(from(from(cons(y0, y1))), y2)))
   MARK(s(cons(from(from(s(y0))), y1))) -> c7(MARK(cons(from(from(s(y0))), y1)))
   MARK(2nd(s(s(y0)))) -> c4(MARK(s(s(y0))))
   MARK(2nd(s(2nd(cons(y0, y1))))) -> c4(MARK(s(2nd(cons(y0, y1)))))
   MARK(2nd(s(2nd(s(y0))))) -> c4(MARK(s(2nd(s(y0)))))
   MARK(2nd(s(2nd(2nd(2nd(y0)))))) -> c4(MARK(s(2nd(2nd(2nd(y0))))))
   MARK(2nd(s(2nd(2nd(from(y0)))))) -> c4(MARK(s(2nd(2nd(from(y0))))))
   MARK(2nd(s(2nd(2nd(cons(y0, y1)))))) -> c4(MARK(s(2nd(2nd(cons(y0, y1))))))
   MARK(2nd(s(2nd(2nd(s(y0)))))) -> c4(MARK(s(2nd(2nd(s(y0))))))
   MARK(2nd(s(2nd(2nd(y0))))) -> c4(MARK(s(2nd(2nd(y0)))))
   MARK(2nd(s(2nd(from(2nd(y0)))))) -> c4(MARK(s(2nd(from(2nd(y0))))))
   MARK(2nd(s(2nd(from(from(y0)))))) -> c4(MARK(s(2nd(from(from(y0))))))
   MARK(2nd(s(2nd(from(cons(y0, y1)))))) -> c4(MARK(s(2nd(from(cons(y0, y1))))))
   MARK(2nd(s(2nd(from(s(y0)))))) -> c4(MARK(s(2nd(from(s(y0))))))
   MARK(2nd(s(2nd(from(y0))))) -> c4(MARK(s(2nd(from(y0)))))
   MARK(2nd(s(from(cons(y0, y1))))) -> c4(MARK(s(from(cons(y0, y1)))))
   MARK(2nd(s(from(s(y0))))) -> c4(MARK(s(from(s(y0)))))
   MARK(2nd(s(from(2nd(y0))))) -> c4(MARK(s(from(2nd(y0)))))
   MARK(2nd(s(from(2nd(2nd(y0)))))) -> c4(MARK(s(from(2nd(2nd(y0))))))
   MARK(2nd(s(from(2nd(from(y0)))))) -> c4(MARK(s(from(2nd(from(y0))))))
   MARK(2nd(s(from(2nd(cons(y0, y1)))))) -> c4(MARK(s(from(2nd(cons(y0, y1))))))
   MARK(2nd(s(from(2nd(s(y0)))))) -> c4(MARK(s(from(2nd(s(y0))))))
   MARK(2nd(s(from(from(y0))))) -> c4(MARK(s(from(from(y0)))))
   MARK(2nd(s(from(from(2nd(y0)))))) -> c4(MARK(s(from(from(2nd(y0))))))
   MARK(2nd(s(from(from(from(y0)))))) -> c4(MARK(s(from(from(from(y0))))))
   MARK(2nd(s(from(from(cons(y0, y1)))))) -> c4(MARK(s(from(from(cons(y0, y1))))))
   MARK(2nd(s(from(from(s(y0)))))) -> c4(MARK(s(from(from(s(y0))))))
   MARK(2nd(s(cons(cons(y0, y1), y2)))) -> c4(MARK(s(cons(cons(y0, y1), y2))))
   MARK(2nd(s(cons(s(y0), y1)))) -> c4(MARK(s(cons(s(y0), y1))))
   MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(2nd(cons(y0, y1)), y2))))
   MARK(2nd(s(cons(2nd(s(y0)), y1)))) -> c4(MARK(s(cons(2nd(s(y0)), y1))))
   MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(2nd(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(2nd(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(2nd(y0)), y1)))) -> c4(MARK(s(cons(2nd(2nd(y0)), y1))))
   MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(2nd(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(from(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(from(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))) -> c4(MARK(s(cons(2nd(from(cons(y0, y1))), y2))))
   MARK(2nd(s(cons(2nd(from(s(y0))), y1)))) -> c4(MARK(s(cons(2nd(from(s(y0))), y1))))
   MARK(2nd(s(cons(2nd(from(y0)), y1)))) -> c4(MARK(s(cons(2nd(from(y0)), y1))))
   MARK(2nd(s(cons(from(cons(y0, y1)), y2)))) -> c4(MARK(s(cons(from(cons(y0, y1)), y2))))
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   MARK(2nd(2nd(s(from(from(s(y0))))))) -> c4(MARK(2nd(s(from(from(s(y0)))))))
   MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))) -> c4(MARK(2nd(s(cons(cons(y0, y1), y2)))))
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   MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
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   MARK(2nd(2nd(s(cons(from(s(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(y0)), y1))))) -> c4(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c4(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))) -> c4(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
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   A__2ND(cons(z0, cons(from(2nd(from(y0))), z2))) -> c(MARK(from(2nd(from(y0)))))
   A__2ND(cons(z0, cons(from(2nd(cons(y0, y1))), z2))) -> c(MARK(from(2nd(cons(y0, y1)))))
   A__2ND(cons(z0, cons(from(2nd(s(y0))), z2))) -> c(MARK(from(2nd(s(y0)))))
   A__2ND(cons(z0, cons(from(from(y0)), z2))) -> c(MARK(from(from(y0))))
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   A__2ND(cons(z0, cons(s(cons(2nd(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(from(y0))), y1))))
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   A__2ND(cons(z0, cons(s(cons(2nd(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(2nd(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(2nd(from(y0)), y1)), z2))) -> c(MARK(s(cons(2nd(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(cons(y0, y1)), y2)), z2))) -> c(MARK(s(cons(from(cons(y0, y1)), y2))))
   A__2ND(cons(z0, cons(s(cons(from(s(y0)), y1)), z2))) -> c(MARK(s(cons(from(s(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(y0)), y1)), z2))) -> c(MARK(s(cons(from(2nd(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(2nd(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(2nd(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(2nd(s(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(y0)), y1)), z2))) -> c(MARK(s(cons(from(from(y0)), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(2nd(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(2nd(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(from(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(from(y0))), y1))))
   A__2ND(cons(z0, cons(s(cons(from(from(cons(y0, y1))), y2)), z2))) -> c(MARK(s(cons(from(from(cons(y0, y1))), y2))))
   A__2ND(cons(z0, cons(s(cons(from(from(s(y0))), y1)), z2))) -> c(MARK(s(cons(from(from(s(y0))), y1))))
   A__2ND(cons(z0, cons(2nd(s(s(y0))), z2))) -> c(MARK(2nd(s(s(y0)))))
   A__2ND(cons(z0, cons(2nd(s(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(s(y0)))), z2))) -> c(MARK(2nd(s(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(s(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(from(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(2nd(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(s(y0))))), z2))) -> c(MARK(2nd(s(2nd(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(2nd(from(y0)))), z2))) -> c(MARK(2nd(s(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(s(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(s(from(s(y0)))), z2))) -> c(MARK(2nd(s(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(y0)))), z2))) -> c(MARK(2nd(s(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(from(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(2nd(s(y0))))), z2))) -> c(MARK(2nd(s(from(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(y0)))), z2))) -> c(MARK(2nd(s(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(2nd(y0))))), z2))) -> c(MARK(2nd(s(from(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(from(y0))))), z2))) -> c(MARK(2nd(s(from(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(s(from(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(s(from(from(s(y0))))), z2))) -> c(MARK(2nd(s(from(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(s(cons(cons(y0, y1), y2))), z2))) -> c(MARK(2nd(s(cons(cons(y0, y1), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(s(y0), y1))), z2))) -> c(MARK(2nd(s(cons(s(y0), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(2nd(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(cons(y0, y1)), y2))), z2))) -> c(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(s(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(s(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(2nd(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(y0)), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(y0)), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(2nd(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(from(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(cons(y0, y1))), y2))), z2))) -> c(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   A__2ND(cons(z0, cons(2nd(s(cons(from(from(s(y0))), y1))), z2))) -> c(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(from(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(2nd(s(y0)))), z2))) -> c(MARK(2nd(2nd(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(2nd(y0)))), z2))) -> c(MARK(2nd(2nd(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(from(y0)))), z2))) -> c(MARK(2nd(2nd(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(2nd(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(from(s(y0)))), z2))) -> c(MARK(2nd(2nd(from(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(s(y0)))), z2))) -> c(MARK(2nd(2nd(s(s(y0))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(2nd(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(2nd(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(cons(y0, y1))))), z2))) -> c(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(s(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(s(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(2nd(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(y0))))), z2))) -> c(MARK(2nd(2nd(s(from(from(y0)))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(2nd(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(from(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(from(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(cons(y0, y1)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(from(from(s(y0)))))), z2))) -> c(MARK(2nd(2nd(s(from(from(s(y0))))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(cons(y0, y1), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(s(y0), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(2nd(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(s(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(y0)), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(from(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   A__2ND(cons(z0, cons(2nd(2nd(s(cons(from(from(s(y0))), y1)))), z2))) -> c(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(2nd(y0)))), z2))) -> c(MARK(2nd(from(2nd(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(from(y0)))), z2))) -> c(MARK(2nd(from(2nd(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(2nd(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(2nd(s(y0)))), z2))) -> c(MARK(2nd(from(2nd(s(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(2nd(y0)))), z2))) -> c(MARK(2nd(from(from(2nd(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(from(y0)))), z2))) -> c(MARK(2nd(from(from(from(y0))))))
   A__2ND(cons(z0, cons(2nd(from(from(cons(y0, y1)))), z2))) -> c(MARK(2nd(from(from(cons(y0, y1))))))
   A__2ND(cons(z0, cons(2nd(from(from(s(y0)))), z2))) -> c(MARK(2nd(from(from(s(y0))))))
   A__FROM(from(cons(y0, y1))) -> c2(MARK(from(cons(y0, y1))))
   A__FROM(from(s(y0))) -> c2(MARK(from(s(y0))))
   A__FROM(from(2nd(y0))) -> c2(MARK(from(2nd(y0))))
   A__FROM(from(2nd(2nd(y0)))) -> c2(MARK(from(2nd(2nd(y0)))))
   A__FROM(from(2nd(from(y0)))) -> c2(MARK(from(2nd(from(y0)))))
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   MARK(s(2nd(s(cons(2nd(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(2nd(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(2nd(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(s(y0))), y1)))))
   MARK(s(2nd(s(cons(2nd(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(2nd(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(cons(y0, y1)), y2))))) -> c7(MARK(2nd(s(cons(from(cons(y0, y1)), y2)))))
   MARK(s(2nd(s(cons(from(s(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(s(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(y0)), y1)))))
   MARK(s(2nd(s(cons(from(2nd(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(2nd(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(2nd(s(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(y0)), y1))))) -> c7(MARK(2nd(s(cons(from(from(y0)), y1)))))
   MARK(s(2nd(s(cons(from(from(2nd(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(2nd(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(from(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(from(y0))), y1)))))
   MARK(s(2nd(s(cons(from(from(cons(y0, y1))), y2))))) -> c7(MARK(2nd(s(cons(from(from(cons(y0, y1))), y2)))))
   MARK(s(2nd(s(cons(from(from(s(y0))), y1))))) -> c7(MARK(2nd(s(cons(from(from(s(y0))), y1)))))
   MARK(s(2nd(2nd(2nd(2nd(y0)))))) -> c7(MARK(2nd(2nd(2nd(2nd(y0))))))
   MARK(s(2nd(2nd(2nd(from(y0)))))) -> c7(MARK(2nd(2nd(2nd(from(y0))))))
   MARK(s(2nd(2nd(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(2nd(cons(y0, y1))))))
   MARK(s(2nd(2nd(2nd(s(y0)))))) -> c7(MARK(2nd(2nd(2nd(s(y0))))))
   MARK(s(2nd(2nd(from(2nd(y0)))))) -> c7(MARK(2nd(2nd(from(2nd(y0))))))
   MARK(s(2nd(2nd(from(from(y0)))))) -> c7(MARK(2nd(2nd(from(from(y0))))))
   MARK(s(2nd(2nd(from(cons(y0, y1)))))) -> c7(MARK(2nd(2nd(from(cons(y0, y1))))))
   MARK(s(2nd(2nd(from(s(y0)))))) -> c7(MARK(2nd(2nd(from(s(y0))))))
   MARK(s(2nd(2nd(s(s(y0)))))) -> c7(MARK(2nd(2nd(s(s(y0))))))
   MARK(s(2nd(2nd(s(2nd(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(2nd(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(2nd(s(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(s(y0)))))))
   MARK(s(2nd(2nd(s(2nd(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(2nd(y0)))))))
   MARK(s(2nd(2nd(s(2nd(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(from(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(2nd(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(2nd(from(s(y0))))))))
   MARK(s(2nd(2nd(s(2nd(from(y0))))))) -> c7(MARK(2nd(2nd(s(2nd(from(y0)))))))
   MARK(s(2nd(2nd(s(from(cons(y0, y1))))))) -> c7(MARK(2nd(2nd(s(from(cons(y0, y1)))))))
   MARK(s(2nd(2nd(s(from(s(y0))))))) -> c7(MARK(2nd(2nd(s(from(s(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(y0))))))) -> c7(MARK(2nd(2nd(s(from(2nd(y0)))))))
   MARK(s(2nd(2nd(s(from(2nd(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(from(y0))))))))
   MARK(s(2nd(2nd(s(from(2nd(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(2nd(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(2nd(s(y0))))))))
   MARK(s(2nd(2nd(s(from(from(y0))))))) -> c7(MARK(2nd(2nd(s(from(from(y0)))))))
   MARK(s(2nd(2nd(s(from(from(2nd(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(2nd(y0))))))))
   MARK(s(2nd(2nd(s(from(from(from(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(from(y0))))))))
   MARK(s(2nd(2nd(s(from(from(cons(y0, y1)))))))) -> c7(MARK(2nd(2nd(s(from(from(cons(y0, y1))))))))
   MARK(s(2nd(2nd(s(from(from(s(y0)))))))) -> c7(MARK(2nd(2nd(s(from(from(s(y0))))))))
   MARK(s(2nd(2nd(s(cons(cons(y0, y1), y2)))))) -> c7(MARK(2nd(2nd(s(cons(cons(y0, y1), y2))))))
   MARK(s(2nd(2nd(s(cons(s(y0), y1)))))) -> c7(MARK(2nd(2nd(s(cons(s(y0), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(2nd(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(2nd(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(cons(y0, y1)), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(cons(y0, y1)), y2))))))
   MARK(s(2nd(2nd(s(cons(from(s(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(s(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(2nd(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(2nd(s(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(y0)), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(y0)), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(2nd(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(2nd(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(from(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(from(y0))), y1))))))
   MARK(s(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(cons(y0, y1))), y2))))))
   MARK(s(2nd(2nd(s(cons(from(from(s(y0))), y1)))))) -> c7(MARK(2nd(2nd(s(cons(from(from(s(y0))), y1))))))
   MARK(s(2nd(from(2nd(2nd(y0)))))) -> c7(MARK(2nd(from(2nd(2nd(y0))))))
   MARK(s(2nd(from(2nd(from(y0)))))) -> c7(MARK(2nd(from(2nd(from(y0))))))
   MARK(s(2nd(from(2nd(cons(y0, y1)))))) -> c7(MARK(2nd(from(2nd(cons(y0, y1))))))
   MARK(s(2nd(from(2nd(s(y0)))))) -> c7(MARK(2nd(from(2nd(s(y0))))))
   MARK(s(2nd(from(from(2nd(y0)))))) -> c7(MARK(2nd(from(from(2nd(y0))))))
   MARK(s(2nd(from(from(from(y0)))))) -> c7(MARK(2nd(from(from(from(y0))))))
   MARK(s(2nd(from(from(cons(y0, y1)))))) -> c7(MARK(2nd(from(from(cons(y0, y1))))))
   MARK(s(2nd(from(from(s(y0)))))) -> c7(MARK(2nd(from(from(s(y0))))))
   MARK(s(from(cons(2nd(y0), z1)))) -> c7(MARK(from(cons(2nd(y0), z1))))
   MARK(s(from(cons(from(y0), z1)))) -> c7(MARK(from(cons(from(y0), z1))))
   MARK(s(from(cons(cons(y0, y1), z1)))) -> c7(MARK(from(cons(cons(y0, y1), z1))))
   MARK(s(from(cons(s(y0), z1)))) -> c7(MARK(from(cons(s(y0), z1))))
   MARK(s(from(s(2nd(y0))))) -> c7(MARK(from(s(2nd(y0)))))
   MARK(s(from(s(from(y0))))) -> c7(MARK(from(s(from(y0)))))
   MARK(s(from(s(cons(y0, y1))))) -> c7(MARK(from(s(cons(y0, y1)))))
   MARK(s(from(s(s(y0))))) -> c7(MARK(from(s(s(y0)))))
K tuples:none
Defined Rule Symbols:   a__2nd_1, a__from_1, mark_1

Defined Pair Symbols:   MARK_1, A__2ND_1, A__FROM_1

Compound Symbols:   c4_2, c_1, c2_1, c5_2, c6_1, c7_1, c4_1