(VAR X Y Z X1 X2) (RULES dbl(0) -> 0 dbl(s(X)) -> s(n__s(n__dbl(activate(X)))) dbls(nil) -> nil dbls(cons(X,Y)) -> cons(n__dbl(activate(X)),n__dbls(activate(Y))) sel(0,cons(X,Y)) -> activate(X) sel(s(X),cons(Y,Z)) -> sel(activate(X),activate(Z)) indx(nil,X) -> nil indx(cons(X,Y),Z) -> cons(n__sel(activate(X),activate(Z)),n__indx(activate(Y),activate(Z))) from(X) -> cons(activate(X),n__from(n__s(activate(X)))) s(X) -> n__s(X) dbl(X) -> n__dbl(X) dbls(X) -> n__dbls(X) sel(X1,X2) -> n__sel(X1,X2) indx(X1,X2) -> n__indx(X1,X2) from(X) -> n__from(X) activate(n__s(X)) -> s(X) activate(n__dbl(X)) -> dbl(activate(X)) activate(n__dbls(X)) -> dbls(activate(X)) activate(n__sel(X1,X2)) -> sel(activate(X1),activate(X2)) activate(n__indx(X1,X2)) -> indx(activate(X1),X2) activate(n__from(X)) -> from(X) activate(X) -> X )