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 C# (judge verdict: Accepted)

using System;

namespace ITP1_8_A
{
    class Program
    {
        static void Main(string[] args)
        {
            char[] input = Console.ReadLine().ToCharArray();

            for (int j=0; j<input.Length; j++)
            {

                    if (char.IsUpper(input[j]))
                    {
                        input[j] = char.ToLower(input[j]);
                    }
                    else if (char.IsLower(input[j]))
                    {
                        input[j] = char.ToUpper(input[j]);
                    }
            }

            Console.WriteLine(input);
        }
    }
}