Problem:
Toggling Cases

Write a program which converts uppercase/lowercase letters to lowercase/uppercase for a given string.

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.

Constraints

The length of the input string < 1200

Sample Input

fAIR, LATER, OCCASIONALLY CLOUDY.

Sample Output

Fair, later, occasionally cloudy.

Solution in JAVA (judge verdict: Accepted)

import java.io.*;
public class Main {

	public static void main(String[] args) throws IOException{
		String s;
		BufferedReader kbd = new BufferedReader(new InputStreamReader(System.in));
			s = kbd.readLine();
			for(int i = 0; i < s.length(); i++){
				if(Character.isUpperCase(s.charAt(i)))
					System.out.print(Character.toLowerCase(s.charAt(i)));
				else if(Character.isLowerCase(s.charAt(i)))
					System.out.print(Character.toUpperCase(s.charAt(i)));
				else
					System.out.print(s.charAt(i));
			}
				System.out.println("");
	}

}