using System;

using System.Collections.Generic;

​

internal class WordParser

    {

        private readonly HashSet<char> _delimiters;

        private readonly HashSet<char> _quotes;

​

        internal WordParser(string delimiters, string quotes)

            : this(delimiters.ToCharArray(), quotes.ToCharArray())

        {

        }

​

        private WordParser(IEnumerable<char> delimiters, IEnumerable<char> quotes)

        {

            _delimiters = new HashSet<char>(delimiters);

            _quotes = new HashSet<char>(quotes);

        }

​

        internal string[] Parse(string line)

        {

            var result = new List<string>();

            int len = line.Length;

​

            for (int i = 0; i < len; i++)

            {

                char current = line[i];

                if (_quotes.Contains(current))

                {

                    for (int j = i + 1; j < len; j++)

                    {

                        if (line[j] != current)

                        {

                            continue;

                        }

                        if (j == len - 1 || _delimiters.Contains(line[j + 1]))

                        {

                            string chunk = line.Substring(i + 1, j - i - 1);

                            result.Add(chunk);

                            i = j + 1;

                            break;

                        }

                    }

                    if (i >= len)

                    {

                        break;

                    }

                    current = line[i];

                }

                if (_delimiters.Contains(current))

                {

                    continue;

                }

                bool chunkFound = false;

                for (int j = i; j < len; j++)

                {

                    if (_delimiters.Contains(line[j]))

                    {

                        result.Add(line.Substring(i, j - i));

                        i = j;

                        chunkFound = true;

                        break;

                    }

                }

                if (!chunkFound)

                {

                    result.Add(line.Substring(i));

                    break;

                }

            }

            return result.ToArray();

        }

}

public class Program

{

    public static void Main()

    {

         var parser = new WordParser(" .,!'\t\n", "\"");

        Parse(parser, @"god faith");

        Parse(parser, @"""god, faith""! man!");

        Console.WriteLine("Hello World");

    }

    private static void Parse(WordParser parser, string query)

    {

        string[] words = parser.Parse(query);

        Console.WriteLine($"Parsing `{query}`");

        foreach(var word in words) 

        {

            Console.WriteLine($"* {word}");

        }

    }

}