using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

    internal static void chkPalindrome(string str)  

 {  

     bool flag = false;  

     for (int i = 0, j = str.Length - 1; i < str.Length / 2; i++, j--)  

     {  

         if (str[i] != str[j])  

         {  

             flag = false;  

             break;  

         }  

         else  

             flag = true;  

     }  

     if (flag)  

     {  

         Console.WriteLine("Palindrome");  

     }  

     else  

         Console.WriteLine("Not Palindrome");  

 }

}