MAYBE
(ignored inputs)COMMENT TPDB SRS_Standard/Zantema_04/z069
input TRS:
   [ a(b(?x)) -> C(?x),
     b(c(?x)) -> A(?x),
     c(a(?x)) -> B(?x),
     A(C(?x)) -> b(?x),
     C(B(?x)) -> a(?x),
     B(A(?x)) -> c(?x),
     a(a(a(a(?x)))) -> A(A(A(?x))),
     A(A(A(A(?x)))) -> a(a(a(?x))),
     b(b(b(b(?x)))) -> B(B(B(?x))),
     B(B(B(B(?x)))) -> b(b(b(?x))),
     c(c(c(c(?x)))) -> C(C(C(?x))),
     C(C(C(C(?x)))) -> c(c(c(?x))),
     B(a(a(a(?x)))) -> c(A(A(A(?x)))),
     A(A(A(b(?x)))) -> a(a(a(C(?x)))),
     C(b(b(b(?x)))) -> a(B(B(B(?x)))),
     B(B(B(c(?x)))) -> b(b(b(A(?x)))),
     A(c(c(c(?x)))) -> b(C(C(C(?x)))),
     C(C(C(a(?x)))) -> c(c(c(B(?x)))),
     a(A(?x)) -> ?x,
     A(a(?x)) -> ?x,
     b(B(?x)) -> ?x,
     B(b(?x)) -> ?x,
     c(C(?x)) -> ?x,
     C(c(?x)) -> ?x ]
TRS:
   [ a(b(?x)) -> C(?x),
     b(c(?x)) -> A(?x),
     c(a(?x)) -> B(?x),
     A(C(?x)) -> b(?x),
     C(B(?x)) -> a(?x),
     B(A(?x)) -> c(?x),
     a(a(a(a(?x)))) -> A(A(A(?x))),
     A(A(A(A(?x)))) -> a(a(a(?x))),
     b(b(b(b(?x)))) -> B(B(B(?x))),
     B(B(B(B(?x)))) -> b(b(b(?x))),
     c(c(c(c(?x)))) -> C(C(C(?x))),
     C(C(C(C(?x)))) -> c(c(c(?x))),
     B(a(a(a(?x)))) -> c(A(A(A(?x)))),
     A(A(A(b(?x)))) -> a(a(a(C(?x)))),
     C(b(b(b(?x)))) -> a(B(B(B(?x)))),
     B(B(B(c(?x)))) -> b(b(b(A(?x)))),
     A(c(c(c(?x)))) -> b(C(C(C(?x)))),
     C(C(C(a(?x)))) -> c(c(c(B(?x)))),
     a(A(?x)) -> ?x,
     A(a(?x)) -> ?x,
     b(B(?x)) -> ?x,
     B(b(?x)) -> ?x,
     c(C(?x)) -> ?x,
     C(c(?x)) -> ?x ]
problems/962.trs: Failure(unknown UNC)
(4 msec.)