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){
try(Scanner sc = new Scanner(System.in)){
String line = sc.nextLine();
String answer = "";
int length = line.length();
for(int i = 0; i<length; i++){
char ch = line.charAt(i);
if(Character.isLowerCase(ch)){
ch = Character.toUpperCase(ch);
}else{
ch = Character.toLowerCase(ch);
}
System.out.printf("%c", ch);
}
System.out.println(answer);
}
}
}
