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();
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < str.length(); i++) {
      char ch = str.charAt(i);
      if (Character.isLowerCase(ch)) {
        sb.append(Character.toUpperCase(ch));
      } else {
        sb.append(Character.toLowerCase(ch));
      }
    }
    System.out.println(sb.toString());
  }
}

