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

namespace YukiCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            var s = Console.ReadLine();
            var pc = s.ToCharArray().Select(c => (Char)(c ^ 0x20)).ToArray();

            Console.WriteLine(new string(pc));
            Console.ReadLine();
        }
    }
}