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) {
		try (Scanner sc = new Scanner(System.in)) {
			String line = sc.nextLine();
			String answer = "";
			int length = line.length();
			for (int i = 0; i < length; i++) {
				char ch = line.charAt(i);
				if (Character.isLowerCase(ch)) {
					ch = Character.toUpperCase(ch);
					System.out.print(ch);
				} else {
					ch = Character.toLowerCase(ch);
					System.out.print(ch);
				}
			}
			System.out.println(answer);
		}
	}

}
