package no163;

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		char[] s = sc.next().toCharArray();
		for(int i=0;i<s.length;i++) {
			s[i] ^= 0x20;
		}
		System.out.println(String.valueOf(s));
	}
}