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 st=br.readLine();
		String[] str=st.split("");

		for(int i=0;i<str.length;i++){
			if(str[i].equals(str[i].toLowerCase())){
				System.out.print(str[i].toUpperCase());
			}else System.out.print(str[i].toLowerCase());
		}
System.out.println();


}}