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 input = sc.nextLine();
		String work = "";
		for(int i = 0; i < input.length(); i++){
			work = input.substring(i,i+1);
			if(Character.isUpperCase(work.charAt(0))){
				System.out.print(work.toLowerCase());
			}else{
				System.out.print(work.toUpperCase());
			}
		}
	}
}