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.util.*;
class Main { 
	public static void main(String...args){
		Scanner scan = new Scanner(System.in);
		String str = scan.nextLine();
		String uStr = str.toUpperCase();
		String[] chars = str.split("");
		String[] uChars = uStr.split("");
		StringBuilder sb = new StringBuilder();

		for(int i = 0; i < chars.length; i++){
			if(chars[i].equals(uChars[i])) {
				sb.append(chars[i].toLowerCase());
			} else {
				sb.append(chars[i].toUpperCase());
			}
		}
		System.out.println(sb.toString());
	}
}
