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 str = sc.nextLine();
		String up = str.toUpperCase();
		String low = str.toLowerCase();
		int i;
		for (i = 0; i < str.length(); i++) {
			if (str.charAt(i) == up.charAt(i))
				System.out.print(low.charAt(i));
			else
				System.out.print(up.charAt(i));
		}
		System.out.println();
	}
}
