Nine-Digit Magic Numbers

using System;

namespace Nine_Digit_Magic_Numbers
{
	class NineDigitMagicNumbers
	{
		public static void Main(string[] args)
		{
			int sum = int.Parse(Console.ReadLine());
			int diff = int.Parse(Console.ReadLine());
			int count = 0;
			for (int num1 = 111; num1 <= 777; num1++)
			{
				int num2 = num1 + diff;
				int num3 = num2 + diff;
				if(NumberIsInRange(num1) && NumberIsInRange(num2) && NumberIsInRange(num3) && (num3 <= 777) && (SumOfNumbers(num1) + SumOfNumbers(num2) + SumOfNumbers(num3) == sum))
				{
					Console.WriteLine("{0}{1}{2}", num1, num2, num3);
					count++;
				}
			}
			if(count == 0)
			{
				Console.WriteLine("No");
			}

		}

		private static int SumOfNumbers(int num)
		{
			int sum = 0;
			while (num > 0)
			{
				sum += num % 10;
				num = num / 10;
			}
			return sum;
		}

		private static bool NumberIsInRange(int num)
		{
			string digits = num.ToString();
			foreach(var digit in digits)
			{
				if(digit < '1' || digit > '7')
				{
					return false;
				}
			}
			return true;
		}
	}
}