01. Valid Usernames

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace _01._Valid_Usernames
{
    class Program
    {
        static void Main(string[] args)
        {

            string[] names = Console.ReadLine()
                .Split(", ")
                .ToArray();
            List<string> validNames = new List<string>();

            for (int i = 0; i < names.Length; i++)
            {
                if (names[i].Length >= 3 && names[i].Length <= 16 && names[i].All(c => Char.IsLetterOrDigit(c) || c.Equals('_') || c.Equals('-')))
                {
                    validNames.Add(names[i]);
                }
            }
            Console.WriteLine(string.Join(Environment.NewLine, validNames));
        }
    }
}