(VAR X XS N Y YS X1 X2) (RULES a__pairNs -> cons(0,incr(oddNs)) a__oddNs -> a__incr(a__pairNs) a__incr(cons(X,XS)) -> cons(s(mark(X)),incr(XS)) a__take(0,XS) -> nil a__take(s(N),cons(X,XS)) -> cons(mark(X),take(N,XS)) a__zip(nil,XS) -> nil a__zip(X,nil) -> nil a__zip(cons(X,XS),cons(Y,YS)) -> cons(pair(mark(X),mark(Y)),zip(XS,YS)) a__tail(cons(X,XS)) -> mark(XS) a__repItems(nil) -> nil a__repItems(cons(X,XS)) -> cons(mark(X),cons(X,repItems(XS))) mark(pairNs) -> a__pairNs mark(incr(X)) -> a__incr(mark(X)) mark(oddNs) -> a__oddNs mark(take(X1,X2)) -> a__take(mark(X1),mark(X2)) mark(zip(X1,X2)) -> a__zip(mark(X1),mark(X2)) mark(tail(X)) -> a__tail(mark(X)) mark(repItems(X)) -> a__repItems(mark(X)) mark(cons(X1,X2)) -> cons(mark(X1),X2) mark(0) -> 0 mark(s(X)) -> s(mark(X)) mark(nil) -> nil mark(pair(X1,X2)) -> pair(mark(X1),mark(X2)) a__pairNs -> pairNs a__incr(X) -> incr(X) a__oddNs -> oddNs a__take(X1,X2) -> take(X1,X2) a__zip(X1,X2) -> zip(X1,X2) a__tail(X) -> tail(X) a__repItems(X) -> repItems(X) )