#include <bits/stdc++.h>
#define int long long
#define enter cout<<"enter"<<'\n';

using namespace std;

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

const int inf = 1e18, mod = 1e9 + 7;
double exp1 = 1e-4;

signed main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	
	double a, b;
	cin >> a >> b;
	cout << string(30, '1');
	cout << 2;
	a = 0.5;
	while (abs(a-b) > exp1)
	{
		if (a > b)
		{
			a *= 0.5;
			cout << 1;
		}
		else 
		{
			a = a / 2 + 0.5;
			cout << 2;
		}
	}
	return 0;
}