#include <bits/stdc++.h>
#define int long long
#define endl "\n"

using namespace std;
typedef pair<int, int> PII;

void solve()
{
	double a, b;
	cin >> a >> b;
	while (a >= 1e-5) {
		a = a / 2.0;
		cout << 1;
	}
	while (abs(a - b) >= 1e-4) {
		if (a > b) {
			a = a / 2.0;
			cout << 1;
		} else {
			a = a / 2.0 + 0.5;
			cout << 2;
		}
	}
}

signed main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);

	int tt = 1;
//	cin >> tt;
	while (tt--) solve();
	return 0;
}