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.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String s = sc.nextLine();
    char c;
    for(int i= 0;i < s.length();i++){
      c = s.charAt(i);
      if(c >= 'A' && c <= 'Z'){
        c += 'a'-'A';
      }else if(c >= 'a' && c <= 'z'){
        c += 'A'-'a';
      }
      System.out.print(c);
    }
    System.out.println("");
    sc.close();
  }
}

