Genome Decoder

using System;
using System.Text;


class GenomeDecoder
{
    static void Main()
    {
        string firstLine = Console.ReadLine();
        string[] format = firstLine.Split(' ');

        string genome = Console.ReadLine();
        int counter = 0;
        int number = 0;
        int result = 0;
        int indexNumbers = 0;
        int indexLetters = 0;
        string letters = null;
        string previous = null;

        string[] genomeLetters = new string[genome.Length];
        int[] genomeNumbers = new int[genome.Length];

        for (int i = 0; i < genome.Length; i++)
        {
            string digit = genome.Substring(i, 1);

            bool check = Int32.TryParse(digit, out number);
            if (check)
            {
                result = number + counter;
                counter = result * 10;

                if (previous == "letter" || i == genome.Length - 1)
                {
                    genomeLetters[indexLetters] = letters;
                    letters = null;
                    indexLetters++;
                }

                if (i == genome.Length - 1)
                {
                    genomeNumbers[indexNumbers] = result;
                }
                previous = "number";
            }
            else
            {
                if (previous == "number")
                {
                    genomeNumbers[indexNumbers] = result;
                    result = 0;
                    counter = 0;
                    number = 0;
                    indexNumbers++;
                }
                else
                {
                    genomeNumbers[indexNumbers] = 1;
                    genomeLetters[indexLetters] = letters;
                    indexNumbers++;
                    indexLetters++;
                }
                letters = digit;

                if (i == genome.Length - 1)
                {
                    genomeLetters[indexLetters] = letters;
                }
                previous = "letter";
            }
        }

        string decoded = null;

        for (int i = 0; i < genomeLetters.Length; i++)
        {
            for (int j = 0; j < genomeNumbers[i]; j++)
            {
                decoded = decoded + genomeLetters[i];
            }
        }

        //Console.WriteLine(decoded);

        int length = int.Parse(format[0]);
        int count = int.Parse(format[1]);
        int start = 0;
        int maximum = decoded.Length/length;
        if (decoded.Length % length != 0)
        {
            maximum = maximum + 1;
        }
        int spaces = maximum / 10 ;

        for (int i = 1; i <= maximum ; i++)
        {
            Console.Write(new string(' ', spaces - i/10));
            Console.Write("{0}", i);
            Console.Write(" ");

            for (int j = 1; j <= length; j++)
            {
                Console.Write(decoded.Substring(start, 1));
                if (j % count == 0)
                {
                    Console.Write(" ");
                }
                start++;
                if (start == decoded.Length)
                {
                    break;
                }
            }
            Console.WriteLine();
        }
    }
}