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.
public class Main {
	public static void main(String[] args){
		java.util.Scanner scan = new java.util.Scanner(System.in);
		String str = scan.nextLine();
		for(int i = 0; i < str.length();i++){
			char arr = str.charAt(i);
			if(Character.isLowerCase(arr)){
				System.out.print(Character.toUpperCase(arr));
				}else{
					System.out.print(Character.toLowerCase(arr));
				}
		}
		System.out.println();
	}

}