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;

public class hello
{

    public static void Main()
    {
        var s = Console.ReadLine().Trim();
        var result = "";
        for (int i = 0; i < s.Length; i++)
        {
            if (char.IsUpper(s[i])) result += s[i].ToString().ToLower();
            else result += s[i].ToString().ToUpper();
        }
        Console.WriteLine(result);
    }
}