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


namespace Problem02.DetectiveBoev
{
    class Program
    {
        static void Main(string[] args)
        {
            string secretWord = Console.ReadLine();
            string encryptedMessage = Console.ReadLine();
            int sumOfDigits = 0;

            var mask = Mask(secretWord);

            byte[] encryptedBytes = Encoding.ASCII.GetBytes(encryptedMessage);

            for (int i = 0; i < encryptedBytes.Length; i++)
            {

                if (encryptedBytes[i] % mask == 0)
                {
                    encryptedBytes[i] += (byte)mask;
                }
                else
                {
                    encryptedBytes[i] -= (byte)mask;
                }
                //Console.Write(encryptedBytes[i] + " ");

            }
            byte[] reversedArrayBytes = new byte[encryptedBytes.Length];
            Array.Reverse(encryptedBytes, 0, encryptedBytes.Length);
            string myString = Encoding.ASCII.GetString(encryptedBytes);
            Console.WriteLine(myString);
            ////byte[] reversedArray = new byte[];
            ////Array.Reverse(reversedArrayBytes);
            //foreach (var token in reversedArrayBytes)
            //{
            //    Console.Write(token);
            ////}
            //for (int i = encryptedBytes.Length - 1; i >= 0; i--)
            //{
            //    Console.WriteLine(encryptedBytes[i] + " ");
            //}
        }

        private static int Mask(string secretWord)
        {
            int tempCode = 0;
            foreach (var letter in secretWord)
            {
                tempCode += letter;
            }

            string secretWordToString = tempCode.ToString();
            int mask = 0;

            while (secretWordToString.Length > 1)
            {
                mask = 0;

                for (int i = 0; i < secretWordToString.Length; i++)
                {
                    mask += Convert.ToInt32(secretWordToString[i].ToString());
                }

                secretWordToString = mask.ToString();
            }

            mask = Convert.ToInt32(secretWordToString);
            return mask;
        }
    }
}