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 {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String word = br.readLine();
		for(int i=0;i<word.length();i++){
			if(Character.isUpperCase(word.charAt(i))){
				System.out.print(Character.toLowerCase(word.charAt(i)));
			}else
				System.out.print(Character.toUpperCase(word.charAt(i)));
		}
		System.out.println("");
	}
}