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);
        char[] s = sc.nextLine().toCharArray();
        sc.close();

        StringBuilder sb = new StringBuilder();
        for(char c: s) {
            if(Character.isUpperCase(c)) {
                sb.append(Character.toLowerCase(c));
            } else {
                sb.append(Character.toUpperCase(c));
            }
        }
        System.out.println(sb);
    }
}

