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.io.*;
public class Main {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String input = br.readLine();
		for(int i = 0; i < input.length(); i++){
			char a = input.charAt(i);
			if(Character.isUpperCase(a)){
				System.out.print(Character.toLowerCase(a));
			}
			else{
				System.out.print(Character.toUpperCase(a));
			}
		}
		System.out.print("\n");
	}
}