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 DocProcessor();

        dp.ProcessDocument( str );

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

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

​

    }

}

​

    public class DocProcessor

    {

        List<int> _kappa = new List<int>();

        List<string> _omicron = new List<string>();

        List<string> _upsilon = new List<string>();

        public int[] kappa { 

            get 

            { 

                return _kappa.ToArray(); 

            }

        }

        public string[] omicron { 

            get 

            { 

                return _omicron.ToArray(); 

            }

        }

        public string[] upsilon { 

            get 

            { 

                return _upsilon.ToArray(); 

            }

        }

        public void ProcessDocument( string doc )

        {           

            _kappa.Clear();

            _omicron.Clear();

            _upsilon.Clear();

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

            var reOmicron = new Regex( "^omicron\\b", RegexOptions.CultureInvariant | RegexOptions.IgnoreCase | RegexOptions.Compiled );

            var reKappa   = new Regex( "^kappa\\b", RegexOptions.CultureInvariant | RegexOptions.IgnoreCase | RegexOptions.Compiled ); 

            var reUpsilon = new Regex( "^upsilon\\b", RegexOptions.CultureInvariant | RegexOptions.IgnoreCase | RegexOptions.Compiled ); 

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

            {

                int index = 0;

                string line;

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

                {

                    var lline = line.TrimStart( spaces );

                    if ( reOmicron.IsMatch( lline ) )

                    {

                        _omicron.Add(line);                     

                    }

                    else            

                    if ( reKappa.IsMatch( lline ) )

                    {

                        _kappa.Add( index );

                    }

                    else

                    if ( reUpsilon.IsMatch( lline ) )

                    {

                        _upsilon.Add( line );

                    }

                    index++;

                }

}

        }

}

​

​