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 s=sc.nextLine();
        
        for(int i = 0; i < s.length(); i++) {
			char c = s.charAt(i);
			if('a' <= c && c <= 'z') 
		     System.out.print((char)(c - 32));
			else if('A' <= c && c <= 'Z') 
			 System.out.print((char)(c + 32));
			else System.out.print(c);
		}
		System.out.println();
        
      
  }
}
