TRS:
 { not(true()) -> false(),
  not(false()) -> true(),
      odd(0()) -> false(),
     odd(s(x)) -> not(odd(x)),
     +(x, 0()) -> x,
    +(x, s(y)) -> s(+(x, y)),
    +(s(x), y) -> s(+(x, y))}
 MPO:
  Prec:
   not > true, 
   not > false, 
   odd > not, 
   odd > false, 
   + > s
   empty
  Strict:
   {}
   Weak:
    {}
  Qed