Write a program which converts uppercase/lowercase letters to lowercase/uppercase for a given string.

Constraints

* The length of the input string < 1200

Input

A string is given in a line.

Output

Print the converted string in a line. Note that you do not need to convert any characters other than alphabetical letters.

Example

Input

fAIR, LATER, OCCASIONALLY CLOUDY.


Output

Fair, later, occasionally cloudy.
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		char[] chars = s.nextLine().toCharArray();
		for (int i = 0; i < chars.length; ++i) {
			if (Character.isUpperCase(chars[i])) {
				chars[i] = Character.toLowerCase(chars[i]);
			} else {
				chars[i] = Character.toUpperCase(chars[i]);
			}
		}
		System.out.println(String.valueOf(chars));
	}
}