MAYBE
(ignored inputs)COMMENT submitted by: Johannes Waldmann secret problem 2019 category: SRS
input TRS:
   [ b(?x) -> c(d(?x)),
     d(?x) -> c(b(?x)),
     c(?x) -> b(d(?x)),
     b(?x) -> c(d(?x)),
     a(?x) -> a(b(?x)),
     a(?x) -> b(c(?x)) ]
TRS:
   [ b(?x) -> c(d(?x)),
     d(?x) -> c(b(?x)),
     c(?x) -> b(d(?x)),
     b(?x) -> c(d(?x)),
     a(?x) -> a(b(?x)),
     a(?x) -> b(c(?x)) ]
New rules by rule reversing:
   [ b(?x) -> b(?x),
     c(d(?x)) -> b(?x),
     d(?x) -> d(?x),
     c(b(?x)) -> d(?x),
     c(?x) -> c(?x),
     b(d(?x)) -> c(?x),
     b(?x) -> b(?x),
     c(d(?x)) -> b(?x),
     a(?x) -> a(?x),
     a(b(?x)) -> a(?x),
     a(?x) -> a(?x),
     b(c(?x)) -> a(?x) ]
problems/1132.trs: Failure(unknown UNC)
(0 msec.)