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();
        char[] c = s.toCharArray();

        for (char q : c) {
            if (Character.isUpperCase(q)) {
                System.out.print((q + "").toLowerCase());
            } else {
                System.out.print((q + "").toUpperCase());
            }
        }

        System.out.println();

    }

}
