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