Hayvan Numbers

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

namespace Exam04
{
    class Exam04
    {
        static void Main()
        {
            int sum = int.Parse(Console.ReadLine());
            int diff = int.Parse(Console.ReadLine());
            bool flag = false;
            for (int i = 555; i <= 999; i++)
            {
                int secondNumber = i + diff;
                int thirdNumber = secondNumber + diff;
                if (i%10<5||(i/10)%10<5||(i/100)%10<5||secondNumber%10<5||(secondNumber/10)%10<5||(secondNumber/100)%10<5||thirdNumber%10<5||(thirdNumber/10)%10<5||(thirdNumber/100)%10<5)
                {
                    continue;
                }
                if (secondNumber>999||thirdNumber>999)
                {
                    break;
                }
                int newSum = 0;
                int firstCopy = i;
                newSum += firstCopy % 10;
                firstCopy /= 10;
                newSum += firstCopy % 10;
                firstCopy /= 10;
                newSum += firstCopy % 10;
                int secondCopy = secondNumber;
                newSum += secondCopy % 10;
                secondCopy /= 10;
                newSum += secondCopy % 10;
                secondCopy /= 10;
                newSum += secondCopy % 10;
                int thirdCopy = thirdNumber;
                newSum += thirdCopy % 10;
                thirdCopy /= 10;
                newSum += thirdCopy % 10;
                thirdCopy /= 10;
                newSum += thirdCopy % 10;
                if(sum==newSum)
                {
                   Console.Write(i);
                   Console.Write(secondNumber);
                   Console.Write(thirdNumber);
                   Console.WriteLine();
                   flag = true;
                }
            }
            if (!flag)
            {
                Console.WriteLine("No");
            }
        }
    }
}