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)) ]
unknown UNC Completion (Strongly Closed)
problems/1132.trs: Failure(unknown UNC)
(8 msec.)