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 a=scan.nextLine();
	for(int i=0;i<a.length();i++) {
		if( Character.isUpperCase( a.charAt( i ) ) ) {
		    System.out.print(Character.toLowerCase(a.charAt(i)));
		}
		else {
			System.out.print(Character.toUpperCase(a.charAt(i)));
		}
	}
	System.out.println();
	}
}
