03. Short Words Sorted

using System;
using System.Collections.Generic;
using System.Linq;

namespace Exam_Shopping
{
    class Program
    {


        static void Main(string[] args)
        {
            string[] arr = Console.ReadLine().ToLower().Split(new char[] {'.', ',', ':', ';', '(', ')', '[', ']', '\"', '\'', '\\', '/', '!', '?', ' '}, StringSplitOptions.RemoveEmptyEntries).ToArray();
            arr = arr.Where(a => a.Length < 5).Distinct().ToArray();
            arr = arr.OrderBy(x => x).ToArray();
                Console.WriteLine(string.Join(", ", arr));

        }
    }
}