using System;

public class Program

{

    public static void Main()

    {

        //Console.WriteLine("Hello World");

        string input = "Hello World";

        int strlength = input.Length;

        string strrev ="";

        for(int i= 0; i<strlength ;i++)

        {

            strrev += input[strlength-1-i];         

            //Console.WriteLine(strrev);

        }

        //Console.WriteLine(strrev);

        string[] words = input.Split(' ');

        string result = "";

        for (int i = words.Length - 1; i >= 0; i--)

        //for(int i>= 0; i=words.Length-1;i--)

        {

          result += words[i] + " ";

        }

        Console.WriteLine(result);

    }

}