#include <bits/stdc++.h>
#define pb push_back
#define DM 2000005
using namespace std;
ifstream fin("multiplu.in");
ofstream fout("multiplu.out");

struct elm{
    string s;
    int r;
};

queue<elm>Q;
int lcm,a,b;
bitset<DM>viz;

int main()
{
    fin>>a>>b;
    lcm = a*b/__gcd(a,b);
    Q.push({"1",1});
    while(!Q.empty()){
        elm curr = Q.front();
        Q.pop();
        if(viz[curr.r]) continue;
        viz[curr.r] = 1;
        if(!curr.r){
            fout<<curr.s;
            return 0;
        }
        int R0 = (curr.r*10)%lcm;
        int R1 = (curr.r*10+1)%lcm;
        Q.push({curr.s+'0',R0});
        Q.push({curr.s+'1',R1});
    }
    return 0;
}