#include <bits/stdc++.h>
using namespace std;
const int p = 998244353;
double s = 0.5;
bool check(double a, double b)
{
    return abs(a - b) <= 1e-4;
}
vector<int> res;
vector<int> ans;

int main()
{
    double a, b;
    cin >> a >> b;
    for (int k = 0; k <= 50; k++)
    {
        bool ok = false;
        for (int l = 0; l <= k; l++)
        {
            double t = a;
            for (int i = 1; i <= l; i++)
                t *= 0.5;
            for (int i = 1; i <= k - l; i++)
                t = t * 0.5 + 0.5;
            if (check(t, b))
            {

                for (int i = 1; i <= l; i++)
                    res.push_back(1);
                for (int i = 1; i <= k - l; i++)
                    res.push_back(2);
                ok = true;
                break;
            }
        }
        if (ok)
            break;
    }

    for (int k = 0; k <= 50; k++)
    {
        bool ok = false;
        for (int l = 0; l <= k; l++)
        {
            double t = a;
            for (int i = 1; i <= l; i++)
                t = t * 0.5 + 0.5;

            for (int i = 1; i <= k - l; i++)
                t *= 0.5;
            if (check(t, b))
            {

                for (int i = 1; i <= l; i++)
                    ans.push_back(2);
                for (int i = 1; i <= k - l; i++)
                    ans.push_back(1);
                ok = true;
                break;
            }
        }
        if (ok)
            break;
    }
    if (ans.size())
    {
        for (int i = 0; i < ans.size(); i++)
            cout << ans[i];
        return 0;
    }

    for (int i = 0; i < res.size(); i++)
        cout << res[i];
    return 0;
}