using System;

using System.Linq;                  

public class Program

{

    public static void Main()

    {

        Console.WriteLine(ReverseAndNot(1234));

    }

    public static string ReverseAndNot(int num)

    {

        string source = num.ToString();

        string reverse = new string(source.Reverse().ToArray());

        return (reverse+source);

    }

}