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[] args) {
        Scanner sc = new Scanner(System.in);
        char[] s = sc.nextLine().toCharArray();
        for (int i=0; i<s.length; ++i) {
            String x = String.valueOf(s[i]);
            if (x.equals(x.toUpperCase())) {
                System.out.print(x.toLowerCase());
            } else if (x.equals(x.toLowerCase())) {
                System.out.print(x.toUpperCase());
            } else {
                System.out.print(x);
            }
        }
        System.out.println("");
        sc.close();
    }
}