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: WA: Presentation Error)

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();
		char temp = 'a';
		for (int i = 0; i < s.length(); i++) {
			temp = s.charAt(i);
			if (temp == ',' || temp == '.' || temp == ' ') {
				System.out.print(temp);
			} else if (Character.isUpperCase(temp)) {
				System.out.print(Character.toLowerCase(temp));
			} else if (Character.isLowerCase(temp)) {
				System.out.print(Character.toUpperCase(temp));
			}
		}
	}
}