#include<bits/stdc++.h>
#define int long long
#define lowbit(x) x&(-x)
#define endl '\n'

using namespace std;

const int N=2e5+10;
const int mod=998244353;
const double eps=1e-6;
typedef pair<int,int>PII;

void solve()
{
	double a,b;
	cin>>a>>b;
	string s;
	while(fabs(a-b)>eps)
	{
		if(a>b)a=a*0.5,s+='1';
		else a=(a-1)*0.5+1.0,s+='2';
		if(s.size()>49)break;
	}
	cout<<s<<endl;
}
signed main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	int t=1;
//	cin>>t;
	while(t--)solve();
	return 0;
}