using System;

public class Program

{

    public static void Main()

    {

        int a, b, c, d , e, f , g, k;

            a = int.Parse(Console.ReadLine());

            b = int.Parse(Console.ReadLine());

            // calculations for "a"

            c = a % 10;

            d = a % 100 / 10;

            e = a % 1000 / 100;

            // calculations for "b"

            f = b % 10;

            g = b % 100 / 10;

            k = b % 1000 / 100;

            Console.Write(k);

            Console.Write(e);

            Console.Write(g);

            Console.Write(d);

            Console.Write(f);

            Console.Write(c);

    }

}