#include <iostream>
#include <string>
#include <cassert>
using namespace std;
using ll = long long;
template<class T> inline bool chmax(T& a, const T& b) {if (a<b) {a=b; return true;} return false;}
template<class T> inline bool chmin(T& a, const T& b) {if (b<a) {a=b; return true;} return false;}
const int INTINF = 1000001000;
const int INTMAX = 2147483647;
const ll LLMAX = 9223372036854775807;
const ll LLINF = 1000000000000000000;

int main() {
  ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  ll N, K; cin >> N >> K;
  K--;
  ll prod = 1;
  {
    ll N2 = N;
    while (N2 > 0) {
      prod *= (N2 % 10) + 1;
      N2 /= 10;
    }
  }

  string ans = "";
  string Nstr = to_string(N);

  for (int i=0; i<int(Nstr.size()); i++) {
    prod /= Nstr[i] - '0' + 1;
    ans += '0' + (K / prod);
    K %= prod;
  }
    
  cout << stoll(ans) << endl;
  return 0;
}