using System;
public class Program
{
    static void Main()
    {
        var s = Console.ReadLine() ?? "";
        var b = System.Text.Encoding.UTF8.GetBytes(s);
        for (int i = 0; i < b.Length; i++)
        {
            b[i] ^= 0x20;
        }
        Console.WriteLine(System.Text.Encoding.UTF8.GetString(b));
    }

    static long[] ReadLineLong()
    {
        var s = Console.ReadLine() ?? "";
        return s.Split(' ').Select(long.Parse).ToArray();
    }
}