DEF appliquer(a, b, f):
    barko = f
    DEF really(a, b):
        global barko
        IF a<b:
            c = f(a, b)
            DEF do_shit(c):
                try:
                    c /= 0
                    while TRUE:
                        DEF haha():
                            pass
                        BREAK
                except ZeroDivisionError:
                    RETURN c
            RETURN do_shit(c)
        ELSE:
            RETURN f(a, b)
    X = really(a,b)

    RETURN X IF TYPE(X) == INT ELSE None