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 sc = new Scanner(System.in);
		String str = sc.nextLine();
		
		for (int i = 0; i < str.length(); i++){
			if (Character.isUpperCase(str.charAt(i))){
				System.out.print(Character.toLowerCase(str.charAt(i)));
			} else if (Character.isLowerCase(str.charAt(i))) {
				System.out.print(Character.toUpperCase(str.charAt(i)));
			} else {
				System.out.print(str.charAt(i));
			}
		}
		System.out.println("");
	}
}