using System;

public class Program

{

    public static void Main()

    {

        string str="",reverse ="";int length;

        Console.WriteLine("Enter string to reverse");

        str = Console.ReadLine();

        //length = str.Length - 1;

        //Console.WriteLine(length);

        for  (int i = str.Length - 1; i >= 0; i--)  //(int i = 0 ; i <= length ;i++)

        //while(length >= 0)

        {

            //Console.WriteLine(length);

            reverse = reverse + str[i];

            //length--;

        }

        Console.WriteLine(reverse);

        Console.ReadLine();

    }

}