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

class Magatro
{
    static void Main()
    {
    string s = Console.ReadLine();
    Dictionary<char, char> D = new Dictionary<char, char>();
    string ss = "qwertyuiopasdfghjklzxcvbnm";
    string sss = "QWERTYUIOPASDFGHJKLZXCVBNM";
    for(int i = 0; i < 26; i++)
        {
            D.Add(ss[i], sss[i]);
            D.Add(sss[i], ss[i]);
        }
    for(int i = 0; i < s.Length; i++)
        {
            Console.Write(D[s[i]]);
        }
        Console.WriteLine();
    }
}