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.*;

public class Main{
	  public static void main(String[] args) {
	      Scanner sc = new Scanner(System.in);
	    	    String S = sc.nextLine();
	    	    char[] ch = S.toCharArray();
	    	    
	    for(char test:ch){
	    if(Character.isUpperCase(test)) 
          System.out.print(Character.toLowerCase(test));
	    else System.out.print(Character.toUpperCase(test));
	    }
	    System.out.println();
	  }
}

