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