using System;

using System.Linq;

​

public class Solution

{

    public static void Main()

    {

        string digit = null;

        int num = 0, count = 0;

        int bookPages = int.Parse(Console.ReadLine());

        string pages = Console.ReadLine();

        int[] arr = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

        for (int i = 1; i < bookPages; i++)

        {

            digit = i.ToString();

            //Console.WriteLine(digit.IndexOf(pages));

            if (digit.IndexOf(pages) > -1)

            {

                count++;

            }

        }

​

        Console.WriteLine(count);

    }

}