MAYBE
MAYBE
TRS:
 {
                   f(X) -> cons(X, f(g(X))),
                g(s(X)) -> s(s(g(X))),
                 g(0()) -> s(0()),
  sel(s(X), cons(Y, Z)) -> sel(X, Z),
   sel(0(), cons(X, Y)) -> X
 }
 DUP: We consider a duplicating system.
  Trs:
   {
                     f(X) -> cons(X, f(g(X))),
                  g(s(X)) -> s(s(g(X))),
                   g(0()) -> s(0()),
    sel(s(X), cons(Y, Z)) -> sel(X, Z),
     sel(0(), cons(X, Y)) -> X
   }
  Fail