#include <fstream>
using namespace std;
ifstream fin ("multiplu.in");
ofstream fout ("multiplu.out");
int A, B, M, aux, w = 1, nr = 1;

int main()
{
    fin >> A >> B;
    while (w && nr <= 50)
    {
        M = 0;
        aux = nr;
        while (aux)
        {
            M = M * 10 + aux % 2;
            aux /= 2;
        }
        if (M % A == 0 && M % B == 0) w = 0;
        nr++;
    }
    fout << M << '\n';
    fout.close();
    return 0;
}