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 scan = new Scanner(System.in);

    String str = scan.nextLine();

    for (int i = 0; i < str.length(); i++) {
      char ch = str.charAt(i);
      if(Character.isUpperCase(ch)) {
        System.out.print(Character.toLowerCase(ch));
      } else if(Character.isLowerCase(ch)) {
        System.out.print(Character.toUpperCase(ch));
      } else {
        System.out.print(ch);
      }
    }
    System.out.println();

  }

}
