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;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Globalization;

namespace Prac
{
    class Prog
    {
        public static void Main()
        {
            var input = Console.ReadLine();
            var output = new string((input.ToCharArray().Select<char, char>(x =>
                {
                    if (char.IsLower(x))
                        return char.ToUpper(x);
                    if (char.IsUpper(x))
                        return char.ToLower(x);
                    return x;
                }).ToArray()));
            Console.WriteLine(output);
        }
    }
}