using System;

using System.Collections;

public class Program

{

    public static void Main()

    {

        string name = "Hello World";

        Console.WriteLine(name);

        int length = name.Length;

        for(int i = length-1; i >= 0;i--)

        {

            char c = (char)name[i];

            Console.Write(c);

        }

    }

}