class Program
    {
        static void Main(string[] args)
        {
            ((Func<bool>)(() => X() || Y() || Z())).Invoke();
        }

        static bool X()
        {
            Console.Write(" X ");
            return false;
        }

        static bool Y()
        {
            Console.Write(" Y ");
            return true;
        }

        static bool Z()
        {
            Console.Write(" Z ");
            return false;
        }
    }