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.io.*;
public class Main{
 public static void main(String[] args)throws IOException{
 BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
     String input=br.readLine();
     for(int i=0;i<input.length();i++){
         char a=input.charAt(i);
         if(Character.isUpperCase(a)){
           System.out.print(Character.toLowerCase(a));
         }else{
               System.out.print(Character.toUpperCase(a));
         }
     }
     System.out.print("\n");
 }
}