#include <fstream>
using namespace std;

ifstream cin ("multiplu.in");
ofstream cout ("multiplu.out");

int main ()
{
    int divizor[2];
    cin >> divizor[0] >> divizor[1];

    int multiplu = 1 , configuratie = 1;
    while (multiplu % divizor[0] || multiplu % divizor[1])
    {
        configuratie++ , multiplu = 0;
        for (int bit = 0 , factor = 1 ; (1 << bit) <= configuratie ; bit++ , factor *= 10)
            multiplu += factor * (configuratie >> bit & 1);
    }

    cout << multiplu;
    cout.close(); cin.close();
    return 0;
}