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;

namespace AizuOnlineJudge
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(string.Join("", Console.ReadLine().Select(e => char.IsUpper(e) ? char.ToLower(e) : char.ToUpper(e))));
        }

        /*private static bool IsInput(out int[] arr)
        {
            var s = Console.ReadLine();
            if (s == "0 0") { arr = null; return false; }

            arr = s.Split(' ').Select(int.Parse).ToArray();
            return true;
        }
        // */
    }
}