#include <fstream>
#include <queue>

using namespace std;

int main()
{
    ifstream fin("multiplu.in");
    ofstream fout("multiplu.out");
    std::queue<int> mq;
    int a, b;
    fin >> a >> b;
    mq.push(1);
    while(!mq.empty() && (mq.front()%a || mq.front()%b))
    {
        mq.push(mq.front()*10);
        mq.push(mq.front()*10+1);
        mq.pop();
    }

    fout << mq.front() << endl;
    return 0;
}