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);
        char a;
        if(Character.isLowerCase(ch)){
          a = Character.toUpperCase(ch);
        }else{
          a = Character.toLowerCase(ch);
        }
        answer += a;
      }
      System.out.println(answer);
    }
  }
}

