using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    // static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (n, k) = (c[0], c[1]);
        --k;
        var ans = new List<long>();
        while (n > 0)
        {
            ans.Add(k % (n % 10 + 1));
            k /= n % 10 + 1;
            n /= 10;
        }
        ans.Add(0);
        while (ans.Count > 1 && ans[^1] == 0) ans.RemoveAt(ans.Count - 1);
        ans.Reverse();
        WriteLine(string.Concat(ans));
    }
}