Exam July Morning 4. Morse Code Numbers

using System;
using System.Globalization;
using System.Threading;

public class MorseCodeNumbers
{
    public static void Main()
    {
        Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
        checked
        {
            int fourDigitNum = int.Parse(Console.ReadLine());

            int digitSum = CalculateTheSumOfDigitsFromTheFourDigitNumber(fourDigitNum);
            bool foundMorseCodeNums = false;
            string[] morseCodes = { "-----", ".----", "..---", "...--", "....-", "....." };
            int m0, m1, m2, m3, m4, m5;
            for (m0 = 0; m0 < morseCodes.Length; m0++)
            {
                for (m1 = 0; m1 < morseCodes.Length; m1++)
                {
                    for (m2 = 0; m2 < morseCodes.Length; m2++)
                    {
                        for (m3 = 0; m3 < morseCodes.Length; m3++)
                        {
                            for (m4 = 0; m4 < morseCodes.Length; m4++)
                            {
                                for (m5 = 0; m5 < morseCodes.Length; m5++)
                                {
                                    int morseProduct = m0 * m1 * m2 * m3 * m4 * m5;
                                    if (morseProduct == digitSum)
                                    {
                                        foundMorseCodeNums = true;
                                        Console.WriteLine("{0}|{1}|{2}|{3}|{4}|{5}|", morseCodes[m0], morseCodes[m1], morseCodes[m2], morseCodes[m3], morseCodes[m4], morseCodes[m5]);
                                    }
                                }
                            }
                        }
                    }
                }
            }

            if (!foundMorseCodeNums)
            {
                Console.WriteLine("No");
            }
        }
    }

    private static int CalculateTheSumOfDigitsFromTheFourDigitNumber(int number)
    {
        checked
        {
            int sum = 0;
            do
            {
                sum += (byte)(number % 10);
                number /= 10;
            }
            while (number > 0);

            return sum;
        }
    }
}