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.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();
		for(int i = 0; i < s.length(); i++) {
			char c = s.charAt(i);
			if(c >= 'A' && c <= 'Z') { System.out.print(Character.toLowerCase(c)); }
			else if(c >= 'a' && c <= 'z') { System.out.print(Character.toUpperCase(c)); }
			else { System.out.print(c); }
		}
		System.out.println("");
		sc.close();
	}
}
