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