#include<bits/stdc++.h>
#include<unordered_map>
using namespace std;
int main()
{
	double a,b;
	cin>>a>>b;
	double a1=a;
	int ans[60]={0};
	int cnt = 0;
	int ww=0;
	int flag=0;
	if(b==0.5)
	{
		for(int i=1;i<=49;++i)cout<<"2";
		cout<<"1";
		return 0;
	}
	while(fabs(a-b)>0.0001)
	{
		ww++;
		if(ww>50)
		{
			flag=1;break;
		}
      //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';
	}
	if(flag==0)
	{
	for(int i = 0;i<cnt;i++)
	{
		cout<<ans[i];
	}
	cout<<endl;
	}
	else{
		cnt=0;
		while(fabs(a1-b)>0.0001)
		{
		
			//cout<<"di"<<ww<<"ci  ";
			if(a1>b)
			{
				a1*=0.5;
				a1*=0.5;
				a1*=0.5;
				//a1*=0.5;
				//ans[cnt++] = 1;
				ans[cnt++] = 1;
				ans[cnt++] = 1;
				ans[cnt++] = 1;
			}
			else
			{
				a1 = a1*0.5+0.5;
			//	a1 = a1*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;
}