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;

class Main{
	public static void main(String[] args) 	{
		Scanner sc = new Scanner(System.in);
		String str = sc.nextLine();
		StringBuffer sb = new StringBuffer(str);
		for(int i = 0 ; i < str.length() ; i++ ) {
			if(Character.isLowerCase(str.charAt(i))) sb.setCharAt(i,Character.toUpperCase(str.charAt(i)));
			else sb.setCharAt(i,Character.toLowerCase(str.charAt(i)));
		}
		System.out.println(sb);
		sc.close();
	}
}
