#include <iostream>
#include <queue>
#include <fstream>
using namespace std;

ifstream fin("multiplu.in");
ofstream fout("multiplu.out");

int main()
{
    int a , b , answer=1e8;
    fin >> a >> b;
    queue<int> q;
    q.push(1);
    while(!q.empty())
    {
        int nr_curent = q.front(); q.pop();
        if(nr_curent >= 2000000)
            break;

        if(nr_curent % a == 0 && nr_curent % b == 0)
        {
            answer=min(answer,nr_curent);
        }
        q.push(nr_curent*10);
        q.push(nr_curent*10+1);
    }
    fout << answer;
    return 0;
}