MAYBE
MAYBE
TRS:
 {
  cond(true(), x, y) -> cond(gr(x, y), y, x),
          gr(0(), x) -> false(),
       gr(s(x), 0()) -> true(),
      gr(s(x), s(y)) -> gr(x, y)
 }
 DUP: We consider a duplicating system.
  Trs:
   {
    cond(true(), x, y) -> cond(gr(x, y), y, x),
            gr(0(), x) -> false(),
         gr(s(x), 0()) -> true(),
        gr(s(x), s(y)) -> gr(x, y)
   }
  Fail