#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<ll,ll>;
#define fix(x) fixed << setprecision(x)
#define asc(x) x, vector<x>, greater<x>
#define rep(i, n) for(ll i = 0; i < n; ++i)
#define all(x) (x).begin(),(x).end()
template<class T>bool chmin(T&a, const T&b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool chmax(T&a, const T&b){if(a<b){a=b;return 1;}return 0;}
constexpr ll INFLL = (1LL << 62), MOD = 998244353;
constexpr int INF = (1 << 30);

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    string s;
    ll k;
    cin >> s >> k;
    --k;
    ll tot = 1;
    int n = s.size();
    rep(i,n) tot *= s[i]-'0'+1;
    ll ans = 0;
    rep(i,n){
        tot /= s[i]-'0'+1;
        ans = ans * 10 + k/tot;
        k %= tot;
    }
    cout << ans << '\n';
    return 0;
}