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 sc = new Scanner(System.in);
        String str = sc.nextLine();
        for(char c : str.toCharArray()){
            if(65 <= c && c <= 90) System.out.print((char)(c + 32));
            else if(97 <= c && c <= 122) System.out.print((char)(c - 32));
            else System.out.print(c);
        }
        System.out.println();
    }

}