package kladd;

import java.util.Scanner;

public class Abc
{

    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        String s = in.nextLine();
        StringBuilder sb = new StringBuilder(s.length());
        sb.append(s);
        System.out.println(sb);
        char c;

        for (int i = 0; i < s.length(); i++)
        {
            if (sb.charAt(i) != ' ')
            {
                if (i%2 == 0)
                {
                    c = sb.charAt(i);
                    System.out.println(c); // to verfi correct char
                    sb.setCharAt(i, (Character.toUpperCase(c)));
                }
                else
                {
                    c = sb.charAt(i);
                    System.out.println(c); // to verfi correct char
                    sb.setCharAt(i, (Character.toLowerCase(c)));
                }

            }
        }

        System.out.println(sb);
    }

}