(VAR X XS N Y YS X1 X2) (RULES pairNs -> cons(0,n__incr(oddNs)) oddNs -> incr(pairNs) incr(cons(X,XS)) -> cons(s(X),n__incr(activate(XS))) take(0,XS) -> nil take(s(N),cons(X,XS)) -> cons(X,n__take(N,activate(XS))) zip(nil,XS) -> nil zip(X,nil) -> nil zip(cons(X,XS),cons(Y,YS)) -> cons(pair(X,Y),n__zip(activate(XS),activate(YS))) tail(cons(X,XS)) -> activate(XS) repItems(nil) -> nil repItems(cons(X,XS)) -> cons(X,n__cons(X,n__repItems(activate(XS)))) incr(X) -> n__incr(X) take(X1,X2) -> n__take(X1,X2) zip(X1,X2) -> n__zip(X1,X2) cons(X1,X2) -> n__cons(X1,X2) repItems(X) -> n__repItems(X) activate(n__incr(X)) -> incr(X) activate(n__take(X1,X2)) -> take(X1,X2) activate(n__zip(X1,X2)) -> zip(X1,X2) activate(n__cons(X1,X2)) -> cons(X1,X2) activate(n__repItems(X)) -> repItems(X) activate(X) -> X )