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