using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DetectiveBoev
{
    class DetectiveBoev
    {
        static void Main(string[] args)
        {
            string secretWord = Console.ReadLine();
            string message = Console.ReadLine();

            int sum = 0;
            for (int i = 0; i < secretWord.Length; i++)
            {
                sum += secretWord[i];
            }
            string strSum = sum.ToString();
            int tempSum = 0;
            while (strSum.Length > 1)
            {
                tempSum = 0;
                for (int i = 0; i < strSum.Length; i++)
                {
                    tempSum += int.Parse(strSum[i].ToString());
                }
                strSum = tempSum.ToString();
            }

            char[] x = message.ToCharArray();
            for (int i = 0; i < x.Length; i++)
            {
                if (x[i] % int.Parse(strSum.ToString()) == 0)
                {
                    x[i] += (char)int.Parse(strSum.ToString());
                }
                else
                {
                    x[i] -= (char)int.Parse(strSum.ToString());
                }
            }
            Array.Reverse(x);
            Console.WriteLine(String.Join("", x));
        }
    }
}