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.*;
import java.io.*;
import static java.lang.System.*;
import static java.lang.Math.*;

public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String str = sc.nextLine();
    for(int i=0; i<str.length(); i++){
      if(Character.isUpperCase(str.charAt(i))){
        System.out.print(Character.toLowerCase(str.charAt(i)));
      }else{
        System.out.print(Character.toUpperCase(str.charAt(i)));
      }
    }
    System.out.println("");
  }
}
