/**
 *  author: Huan 
 *  躺平日记
 *  created: 2024-03-31 09:21:59
**/
#include <bits/stdc++.h>
#define ll long long
//#define int long long 
using namespace std;

const int mod = 1e9 + 7;
const int N = 1e6 + 10;


signed main(void) {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    double a,b;
    cin >> a >> b;
    vector<double>p(51,1.0);
    for(int i = 1;i <= 50 ;i ++)
    {
        p[i] = p[i - 1] * 0.5;
    }
    for(int i = 1 ;i <= 50 ; i ++)
    {
        vector<int>v(51, 0);
        double x = a * p[i];
        for(int j = 1 ;j <= i ;j ++)
        {
            if (abs(x + p[j] - b) <= 0.0001){
                // cout << x + p[j] << "++" << endl;
                v[j] = 1;
                for (int k = i; k >= 1; k -- ){
                    if (v[k] == 0){
                        cout << 1;
                    }
                    else cout << 2;
                }
                cout << endl;
                return 0;
            }
            if (x + p[j] <= b){
                x += p[j];
                v[j] = 1;
            }
            if (abs (x - b) <= 0.0001){
                // cout << x << endl;
                for (int k = i; k >= 1; k -- ){
                    if (v[k] == 0){
                        cout << 1;
                    }
                    else cout << 2;
                }
                cout << endl;
                return 0;
            }
        }
    }
    return 0;
}