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;

enum occupant
{
build, floor, room, number
}

class Program
 {



    static void Main(string[] args)
    {
        string nyuryoku;
        char[] data;


        nyuryoku = Console.ReadLine();
        data = new char[nyuryoku.Length];
        for (int i = 0; i < nyuryoku.Length; i++)
        {
            if(Char.IsUpper(nyuryoku[i]))
                data[i] = Char.ToLower(nyuryoku[i]);
            else if(Char.IsLower(nyuryoku[i]))
                data[i] = Char.ToUpper(nyuryoku[i]);
            else
                data[i] = nyuryoku[i];
        }
        string result = new string(data);
        Console.WriteLine(result);
  





    }

 }