using System;

public class Program

{

    class Message{

        private string _decodedMessage = "";

        public void encodeMessage(String header, String payload) {

            _decodedMessage = header+":"+payload;

        }

        public String extractPayload(String msg){

            return _decodedMessage.Split(':')[1];

        }

    }

    public static void Main()

    {

        Message msg1 = new Message();

        Message msg2 = new Message();

        Console.WriteLine("Hello World");

    }

}