(VAR f x xs y )
(STRATEGY INNERMOST)
(RULES 
        app(intlist, nil) -> nil
        app(intlist, app(app(cons, x), y)) -> app(app(cons, app(s, x)), app(intlist, y))
        app(app(int, 0), 0) -> app(app(cons, 0), nil)
        app(app(int, 0), app(s, y)) -> app(app(cons, 0), app(app(int, app(s, 0)), app(s, y)))
        app(app(int, app(s, x)), 0) -> nil
        app(app(int, app(s, x)), app(s, y)) -> app(intlist, app(app(int, x), y))
        app(app(map, f), nil) -> nil
        app(app(map, f), app(app(cons, x), xs)) -> app(app(cons, app(f, x)), app(app(map, f), xs))
        app(app(filter, f), nil) -> nil
        app(app(filter, f), app(app(cons, x), xs)) -> app(app(app(app(filter2, app(f, x)), f), x), xs)
        app(app(app(app(filter2, true), f), x), xs) -> app(app(cons, x), app(app(filter, f), xs))
        app(app(app(app(filter2, false), f), x), xs) -> app(app(filter, f), xs)
        
)