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