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

namespace בגרות_2003_תרגיל_8
{
    class Program
    {
        static void Main(string[] args)
        {
            string strBefore;
            string strAfter;
            int count = 1;
            char ch;
            string strCh;

            Console.WriteLine("Input a phrase no longer than 120 characters:");
            strBefore = Console.ReadLine();
            strAfter = strBefore;

            for (int i = 0; i < strBefore.Length - 1; i++)
            {
                if (strBefore[i] < 'M' && strBefore[i] >= 'A')
                {
                    ch = strBefore[i];
                    ch++;
                    strCh = ch.ToString();

                    strAfter = strAfter.Insert(i + count, strCh);

                    count++;
                }
                else if (strBefore[i] >= 'M' && strBefore[i] <= 'Z')
                {
                    ch = strBefore[i];
                    ch--;
                    strCh = ch.ToString();

                    strAfter = strAfter.Insert(i + count, strCh);

                    count++;
                }
                else if (strBefore[i] == ' ')
                {
                    strAfter = strAfter.Replace(" ", "");
                }
            }

            Console.WriteLine();
            Console.WriteLine(strAfter);
        }
    }
}