using System;
using System.Linq;

namespace ConsoleApplication926
{
    class Program
    {
        static void Main()
        {
            var numbers = Console.ReadLine().Split(' ').Where(x => x.Length == 2).ToArray();
            for (int i = numbers.Length-1; i >= 0; i--)
            {
                char[] charArray = numbers[i].ToCharArray();
                Array.Reverse(charArray);
                Console.Write(System.Convert.ToChar(System.Convert.ToUInt32(new string(charArray), 16)));
            }
            Console.WriteLine();
        }
    }
}