#include<bits/stdc++.h>
#include<unordered_map>
using namespace std;
int main()
{
	double a,b;
	cin>>a>>b;
	int ans[60]={0};
	int cnt = 0;
//	int ww=0;
	while(fabs(a-b)>0.0001)
	{
	//	ww++;
      //cout<<"di"<<ww<<"ci  ";
		if(a>b)
		{
			a*=0.5;
			//a*=0.5;
			//ans[cnt++] = 1;
			ans[cnt++] = 1;
		}
		else
		{
			a = a*0.5+0.5;
			a = a*0.5+0.5;
			ans[cnt++] = 2;ans[cnt++] = 2;
		}
		//cout<<fixed<<setprecision(6)<<a<<'\n';
	}
	for(int i = 0;i<cnt;i++)
	{
		cout<<ans[i];
	}
	cout<<endl;
	return 0;
}