#include<bits/stdc++.h>
using namespace std;
//#define int long long
typedef long long ll;
const int N=5e3+5;
const int M=25;
const ll inf=0x3f3f3f3f3f3f3f3f;
const double pi=atan(1.0)*4;
typedef pair<int,int>pii;
int read(){
    int x=0,f=1;
    char ch=getchar();
    while(ch>'9'||ch<'0'){
        if(ch=='-')f=-1;ch=getchar();
    }while(ch<='9'&&ch>='0'){
        x=x*10+ch-'0';ch=getchar();
    }return x*f;
}
double a,b;
double s=0.5;
vector<double>v;
int f=0;
void dfs(double a,int m)
{
	//printf("%.4lf\n",a);
	if(f==1) return;
	if(m>50) return;
	if(abs(a-b)<=0.00001&&f==0)
	{
		 f=1;
		 for(int i=0;i<v.size();i++)
		 {
		 	cout<<v[i];
		 }
		 return;
	}
	v.push_back(1);
	dfs(a*s,m+1);
	v.pop_back();
	v.push_back(2);
	dfs((a-1.0)*s+1.0,m+1);
	v.pop_back();
}
int main()
{
    cin>>a>>b;
    dfs(a,0);
}
//11111111111111111
//1111111111111111111111