using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string[] inputs = {"Third Street Promenade, 1220 3rd St ,Santa Monica, CA 90401","Hi there should"};

        Func<string, string> clean = x => new String(x.Where(c => Char.IsLetterOrDigit(c) || c == ' ').ToArray());

        var outputs = inputs.SelectMany(input => clean(input).Split(' '));

        foreach (var output in outputs)

            Console.WriteLine(output);

    }

}