using System;

using System.Text;

using System.Collections.Generic;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        var lines_list = new List<string>();

        var wordsArr = new string[]{"alpha", "beta", "gama", "delta", "Epsilon", "Zeta", "Eta", "Theta", "Iota", "kaPPa", "LamBda", "mU", "Nu", "xi", "omicron", "pi", "rHo", "siGma", "Tau", "UpSiLoN", "pHi", "chi", "psi", "omega"};

        var ss = new StringBuilder();

        var rnd = new Random( 12345 );      

        for ( int i = 0; i < 50000; i++ )

        {            

             var words_arr = new List<string>();

             for ( int j = 0; j < rnd.Next(10,20); j++)

             {

                words_arr.Add( wordsArr[ rnd.Next( wordsArr.Length ) ] );            

             }

             var tab_count = rnd.Next( 0, 5 );

             var line = new StringBuilder();

             if ( i % 17 == 0 )

             {

                 line.Append("\t\n");

             }

             else

             {

                if ( i % 33 == 0 )

                 {

                     line.Append("\n");

                 }

                else

                {

                    for ( int k = 0; k < tab_count; k++ ) line.Append("\t");                    

                    foreach( var w in words_arr ) 

                    {

                        line.Append( " " + w );

                    }                   

                }

             }

            var result = line + "\n";

            ss.Append( result );

            lines_list.Add( result );

​

        }

        var str = ss.ToString();

​

        var sw = new System.Diagnostics.Stopwatch();    

        sw.Start();

​

        var dp = new TextProcessor();

        dp.ProcessFile ( str, wordsArr );

        //Console.WriteLine( dp.kappa.Length + dp.omicron.Length + dp.upsilon.Length );

        Console.WriteLine("Time:" + sw.ElapsedMilliseconds + " ms.");

​

    }

}

​

    public class TextProcessor

        {

            public Dictionary<string, int> data;

            public string[] keys;

            public int[] vals;

            struct ValuePair

            {

                public int Value1;

                public string Value2;

            }

            public void ProcessFile(string doc , string[] words)

            {   

                //data = new Dictionary<string, int>(); 

                //data = new Dictionary<int, ValuePair> dictionary = new Dictionary<int, ValuePair>();

                var data = new Dictionary<string, ValuePair>();

                var spaces = new char[]{' ','   '};

                if (doc != null)

                {

                    using (System.IO.StringReader sr = new System.IO.StringReader(doc))

                    {

                        int index = 0;

                        string line;

                        while ((line = sr.ReadLine()) != null)

                        {

                            index++;

                            var word = line.TrimStart(spaces).Split()[0].ToLower();

                            if (Array.IndexOf(words, word) > -1)

                            {

                                if (data.ContainsKey(word))

                                {

                                    data[key].Add(new ValuePair {Value1=index, Value2=line});

                                }

                                else

                                {

                                    data.Add(word, new ValuePair {Value1=index, Value2=line});  

                                }

                            }

                        }

                    }

                }

                keys = new string[data.Keys.Count];

                data.Keys.CopyTo(keys, 0);

                vals = new int[data.Values.Count];

                //data.Values.CopyTo(vals, 0);

            }

        }

​

​

​