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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


public class Main {

	public static void main(String[] args) throws IOException{
		// 入力導入部
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		
		String strin=br.readLine();
		String[] str=strin.split("");
		
		for(String i:str){
			if(i.equals(i.toLowerCase())){
				System.out.print(i.toUpperCase());
			}else System.out.print(i.toLowerCase());
		}
		
		System.out.println();
		}}