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;

class Main {
	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		String str = sc.nextLine();
		
		
		for(int i = 0; i < str.length(); i++) {
			String s =String.valueOf(str.charAt(i));
			if(!(s.equals(s.toUpperCase()))) {
				System.out.print(s.toUpperCase());
			}else if(!(s.equals(s.toLowerCase()))) {
				System.out.print(s.toLowerCase());
			}else {
				System.out.print(s);
			}
		}
		System.out.println();
	}
}

