TRS: { app(nil(), YS) -> YS, app(cons(X, XS), YS) -> cons(X, app(XS, YS)), from(X) -> cons(X, from(s(X))), zWadr(nil(), YS) -> nil(), zWadr(XS, nil()) -> nil(), zWadr(cons(X, XS), cons(Y, YS)) -> cons(app(Y, cons(X, nil())), zWadr(XS, YS)), prefix(L) -> cons(nil(), zWadr(L, prefix(L)))} Fail