using System;
using System.Text;


namespace _01._Reverse_Strings
{
    class Reverse_Strings
    {
        static void Main()
        {
            string text = Console.ReadLine();
            string reversedText = "";

            while (text != "end")
            {


                for (int i = text.Length - 1; i >= 0; i--)
                {
                    reversedText += text[i];
                }
            }
            Console.WriteLine($"{text} -> {reversedText}");
        }
    }
}