TRS:
 {  p(m, n, s(r)) -> p(m, r, n),
  p(m, s(n), 0()) -> p(0(), n, m),
   p(m, 0(), 0()) -> m}
 MPO:
  Prec:
   s > 0
   empty
  Strict:
   {}
   Weak:
    {}
  Qed