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 C_sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            string line = Console.ReadLine();
            char[] chars;

            chars = line.ToCharArray(0, line.Length);

            foreach (var c in chars)
            {
                if (Char.IsLower(c))
                {
                    Console.Write(Char.ToUpper(c));
                }
                else
                {
                    Console.Write(Char.ToLower(c));
                }
            }

            Console.WriteLine();
        }
    }
}