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

namespace ConsoleApplication21
{
    class Program
    {
        static void Main(string[] args)
        {
            int num, dig, original,numdig;
            Console.WriteLine("Please enter a number: ");
            num = int.Parse(Console.ReadLine());
            Console.WriteLine("Please enter one digit: ");
            dig = int.Parse(Console.ReadLine());
            original = num;
            numdig = dig + 1;
            while (num > 0 && numdig != dig)
            {
                numdig = num % 10;
                num /= 10;
            }
            if (numdig != dig)
                Console.WriteLine((original / 10 * 10 + dig));
        }
    }
}