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;

class Program
{
    static void Main(string[] args)
    {
        string str = Console.ReadLine();


        char[] chary = str.ToCharArray();

        for (int i = 0; i < chary.Length; i++)
        {
            if (Char.IsUpper(chary[i]))
            {
               chary[i] = Char.ToLower(chary[i]);
               
            }
            else if (Char.IsLower(chary[i]))
            {
               chary[i] = Char.ToUpper(chary[i]);
            }
        }

        foreach (var c in chary)
        {
            Console.Write(c);
        }
        Console.WriteLine();
    }
}