using System;

namespace yukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            string str = Console.ReadLine();
            string[] a = {"Z","Y","X","W","V","U","T","S","R","Q","P","O","N","M","L","K","J","I","H","G","F","E","D","C","B","A"};
            string ans="";
            int am;
            int count = 0;
            for(int i = 0; i < str.Length; i++)
            {
                string str1 = str.Substring(i, 1);
                count++;
                for (int j=0;j<a.Length;j++)
                {
                    if (a[j] == str1)
                    {
                        if (j+count > 25)
                        {
                            am =( j + count) % 26;
                            ans += a[am];
                            break;
                        }
                      
                        ans+=a[j + count];
                    }
                }
            }
            Console.WriteLine(ans);

        }
            

    }
}