#include <bits/stdc++.h>

#define x first
#define y second
#define pb push_back

using namespace std;

const int N = 2e5 + 10;
const int P = 1e9 + 7, INF = 0x3f3f3f3f;
const double eps = 1e-4;

typedef pair<int, int> PII;
typedef pair<double, double> PDD;
typedef long long LL;

void solve() {
    double a, b;
    cin >> a >> b;

    if(fabs(a - b) <= eps) return ;

    for(int i = 0; i < 1 << 25; i ++ ) {
    	double t = a;
    	for(int j = 0; j < 25; j ++ ) {
    		if(i >> j & 1) t /= 2;
    		else t = t / 2 + 0.5;
    		if(fabs(t - b) <= eps) {
    			//cout << t << '\n';
	    		for(int k = 0; k <= j; k ++ ) 
	    			if(i >> k & 1) cout << 1;
	    			else cout << 2;
	    		return ;
	    	}
    	}
    }
}

int main() {
    int T = 1;
    //cin >> T;
    while(T -- ) {
        solve();
    }
    return 0;
}