#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#ifdef local
#include <C++/core/io/debug_print.hpp>
#else
#define dump(...) void(0);
#endif

#include <iostream>
#include <valarray>
#include <algorithm>
#include <ranges>
namespace man {

}
int main() {
    std::cin.tie(nullptr) -> sync_with_stdio(false);
    std::string n;
    int64_t k;
    std::cin >> n >> k;
    const auto sol = [&](const std::string &t) -> std::string {
        int64_t now = 1;
        std::string s;
        for(const auto &e: t | std::views::reverse) {
            const int f = e - '0' + 1;
            if(now * f >= k) {
                for(const auto &i: std::views::iota(0, f)) {
                    if(now + i == k) {
                        s += i + '0';
                        std::ranges::reverse(s);
                        return s;
                    }
                }
            }
            now *= f;
            s += e;
        }
        return s;
    };
    std::cout << sol(n) << '\n';
}