NineDigitNumbers

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace NineDigitNumbers
{
    class NineDigitNumbers
    {
        static void Main(string[] args)
        {
            uint sum = uint.Parse(Console.ReadLine());
            uint diff = uint.Parse(Console.ReadLine());
            string currentNum = "";
            int count = 0;
            int currentSum = 0;

            for (int i = 111111111; i <= 777777777; i++)
            {
                currentNum = i.ToString();
                for (int j = 0; j < currentNum.Length; j++)
                {
                    if (currentNum[j] == '0' || currentNum[j] == '8' || currentNum[j] == '9')
                    {
                        break;
                    }
                    else
                    {
                        count++;
                    }
                }

                if (count == 9)
                {
                    List<int> digitsOfCurrentNumber = new List<int>();

                    for (int j = 0; j < currentNum.Length; j++)
                    {
                        digitsOfCurrentNumber.Add(int.Parse(currentNum[j].ToString()));
                    }

                    for (int e = 0; e < currentNum.Length; e++)
                    {
                        currentSum += digitsOfCurrentNumber[e];
                    }

                    int k = 0;

                    if (currentSum == sum)
                    {
                        int firstTriplNums = int.Parse(digitsOfCurrentNumber[k].ToString() + digitsOfCurrentNumber[k + 1].ToString() +
                            digitsOfCurrentNumber[k + 2].ToString());
                        int secondTriplNums = int.Parse(digitsOfCurrentNumber[k + 3].ToString() + digitsOfCurrentNumber[k + 4].ToString() +
                            digitsOfCurrentNumber[k + 5].ToString());
                        int thirdTriplNums = int.Parse(digitsOfCurrentNumber[k + 6].ToString() + digitsOfCurrentNumber[k + 7].ToString() +
                            digitsOfCurrentNumber[k + 8].ToString());

                        if (thirdTriplNums - secondTriplNums == diff && secondTriplNums - firstTriplNums == diff)
                        {
                            foreach (var item in digitsOfCurrentNumber)
                            {
                                Console.Write(item);
                            }
                            Console.WriteLine();
                        }
                    }

                    digitsOfCurrentNumber.Clear();
                    currentSum = 0;

                }

                count = 0;
                currentNum = "";
            }
        }
    }
}