(VAR N X X1 X2 XS Y YS )
(RULES 
        from(X) -> cons(X, n__from(s(X)))
        sel(0, cons(X, XS)) -> X
        sel(s(N), cons(X, XS)) -> sel(N, activate(XS))
        minus(X, 0) -> 0
        minus(s(X), s(Y)) -> minus(X, Y)
        quot(0, s(Y)) -> 0
        quot(s(X), s(Y)) -> s(quot(minus(X, Y), s(Y)))
        zWquot(XS, nil) -> nil
        zWquot(nil, XS) -> nil
        zWquot(cons(X, XS), cons(Y, YS)) -> cons(quot(X, Y), n__zWquot(activate(XS), activate(YS)))
        from(X) -> n__from(X)
        zWquot(X1, X2) -> n__zWquot(X1, X2)
        activate(n__from(X)) -> from(X)
        activate(n__zWquot(X1, X2)) -> zWquot(X1, X2)
        activate(X) -> X
        
)