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 sc = new Scanner(System.in);
		String c;
		c = sc.nextLine();

		for (int i = 0; i < c.length(); i++) {
			char t = c.charAt(i);
			if ('A' <= t && t <= 'Z') {
				t += 32;
			} else if ('a' <= t && t <= 'z') {
				t -= 32;
			}
			System.out.print(t);
		}
		System.out.println();
	}
}
