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.IO;


namespace StartFinish
{

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

            for(int i = 0; i < str.Length; i++)
            {
                //??§????????????
                if (char.IsUpper(str[i]))
                {
                    str[i] = char.ToLower(str[i]);
                }
                else
                {
                    str[i] = char.ToUpper(str[i]);
                }
            }
            Console.WriteLine(str);
        }
    }
}