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.InputStreamReader;
import java.lang.StringBuilder;
public class Main {
	public static void main(String[] args) throws Exception{
		BufferedReader sc = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();
		char[] ch = sc.readLine().toCharArray();
		for(char c:ch){
			String s = String.valueOf(c);
			if(c < 'a'){
				sb.append(s.toLowerCase());
			}else if(c >= 'a'){
				sb.append(s.toUpperCase());
			}
		}
		System.out.println(sb);
	}
}