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.*;

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