#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	string s;
	ll k;
	cin >> s >> k;
	k--;
	ll mul = 1;
	const int n = s.size();
	string t(n, '0');
	for(int i = 0; i < n; i++){
		mul *= s[i] - '0' + 1;
	}
	for(int i = 0; i < n; i++){
		mul /= s[i] - '0' + 1;
		int d = k / mul;
		t[i] += d;
		k -= mul * d;
	}
	cout << stoll(t) << '\n';
}