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 scan=new Scanner(System.in);
		String str = scan.nextLine();
		char[] c=str.toCharArray();
		
		for(int i=0;i<c.length;i++){
			if(c[i] >='a' && c[i]<='z')
				c[i]-='a'-'A';
			else if(c[i] >= 'A' && c[i] <= 'Z')
				c[i]+='a'-'A';
		}
		
		str=String.valueOf(c);
		
		System.out.println(str);
		
	}
}
