class A
    {
        public A (float x, short y)
        {
            Console.Write(1);
        }
        public A(float x, byte y)
        {
            Console.Write(2);
        }
        public A(double x, int y)
        {
            Console.Write(3);
        }
        public A(byte x, byte y,byte z):this (x,y)
        {
            Console.Write(4);
        }
    }
    class MainClass
    {
        public static void Main(string[] args)
        {
            byte x = 1, y = 1, z = 1;
            A o = new A(x, y, z);
        }
    }