MAYBE
(ignored inputs)COMMENT doi:10.1016/0890-5401 ( 90 ) 90015-A [24] Example 1 submitted by: Takahito Aoto , Junichi Yoshida , and Yoshihito Toyama
input TRS:
   [ a -> f(a,b),
     f(a,b) -> f(b,a) ]
TRS:
   [ a -> f(a,b),
     f(a,b) -> f(b,a) ]
New rules by rule reversing:
   [ a -> a,
     f(a,b) -> a,
     f(a,b) -> f(b,a) ]
problems/80.trs: Failure(unknown UNC)
(4 msec.)