MAYBE
MAYBE
TRS:
 {f(x, f(a(), y)) -> f(f(y, f(f(a(), a()), a())), x)}
 DUP: We consider a non-duplicating system.
  Trs:
   {f(x, f(a(), y)) -> f(f(y, f(f(a(), a()), a())), x)}
  Fail