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

const double eps=1e-4;
// int n,m;

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

	vector<int> q;
	while(fabs(a-b)>eps)
	{
		if(a>b)
		{
			a=a/2;
			q.push_back(1);
		}
		else
		{
			a=a/2+0.5;
			q.push_back(2);
		}
	}

	for(auto it:q) cout<<it;
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t=1;
    // cin>>t;

    while(t--)
        solve();

    return 0;
}