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