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.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Main {
	public static void main(String[] args) throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String str=br.readLine();
		for(int i=0;i<str.length();i++){
			String ans=str.substring(i, i+1);
			if(ans.equals(ans.toLowerCase())) ans=ans.toUpperCase();
			else if(ans.equals(ans.toUpperCase())) ans=ans.toLowerCase();
			System.out.print(ans);
		}
		System.out.println("");
	}
}