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.util.Scanner;

public class Main {
	public static void main(String[] arges) {

		Scanner sc = new Scanner(System.in);
		String line = sc.nextLine();
		
		StringBuilder r = new StringBuilder();
		for (int i = 0; i < line.length(); i++) {

			if (Character.isUpperCase(line.charAt(i))) {
				r.append(String.valueOf(line.substring(i, i + 1).toLowerCase()));
			} else if (Character.isLowerCase(line.charAt(i))) {
				r.append(String.valueOf(line.substring(i, i + 1).toUpperCase()));
			} else {
				r.append(String.valueOf(line.substring(i, i + 1)));
			}

		}
		System.out.println(r);
	}
}