#include <bits/stdc++.h>
using namespace std;

using i64 = long long;

int __OneWan_2024 = [](){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	return 0;
}();
map<double, int> dist;
map<double, array<double, 2>> pre;
int main() {
	double a, b;
	cin >> a >> b;
	dist[a] = 0;
	queue<double> que;
	que.push(a);
	pre[a] = {-1, -1};
	while (!que.empty()) {
		double x = que.front();
		que.pop();
		if (fabs(x - b) < 1e-5) break;
		{
			double tx = x * 0.5;
			if (!dist.count(tx)) {
				dist[tx] = dist[x] + 1;
				pre[tx] = {x, 1};
				que.push(tx);
			} else {
				if (dist[tx] > dist[x] + 1) {
					dist[tx] = dist[x] + 1;
					pre[tx] = {x, 1};
					que.push(tx);
				}
			}
		}
		{
			double tx = (x + 1) / 2;
			if (!dist.count(tx)) {
				dist[tx] = dist[x] + 1;
				pre[tx] = {x, 2};
				que.push(tx);
			} else {
				if (dist[tx] > dist[x] + 1) {
					dist[tx] = dist[x] + 1;
					pre[tx] = {x, 2};
					que.push(tx);
				}
			}
		}
	}
	vector<int> ans;
	double now = b;
	while (pre[b][0] != -1) {
		ans.push_back(pre[b][1]);
		b = pre[b][0];
	}
	for (auto &x : ans) {
		cout << x;
	}
	return 0;
}