#include<bits/stdc++.h>
#define int long long
#define x first
#define y second
#define IO ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define pb(x) push_back(x)
#define endl '\n'
#define fix(x) cout << fixed << setprecision(x) ;
//#pragma GCC optimize(2)

using namespace std;
typedef pair<int,int>PII;
typedef pair<double,double>PDD;
typedef pair<int,PII>PIP;
typedef pair<PII,int>PPI;
typedef vector<int>VI;
const int N =5e5+5;
const long long INF = 1e16;
int mod= 1e9+9;



inline void Solve(){
	double a,b;
	cin>>a>>b;
	if(b<=1e-4){
		for(int i=1;i<=50;i++){
			cout<<1;
		}
		return;
	}
	int t=fabs(b-a);
	double dt=fabs(b-a)-t;
	int idx = 0;
	while(fabs(dt)>1e-4){
		if(idx>=50)break;
		idx++;
		b*=2.0;
		t=fabs(b-a);
		dt=fabs(b-a)-t;
	//	cout<<b<<" "<<dt<<endl;
	}
	vector<int>res;
	for(int i=0;i<=49&&i<idx;i++){
		if((t>>i)&1)res.push_back(2);
		else res.push_back(1);
	}
	for(auto x:res){
		cout<<x;
	}
}
	

//1 0.75
signed main(){
	IO
//	fix(16);

	int T=1;
//	cin>>T;
	for(int i=1;i<=T;i++){
	
	
		Solve();
	}
	return 0;
	
}

/*

*/

int lowbit(int n)
{
	return n&-n;
}

inline void read(int &x)
{
   int f=0;x=0;char c=getchar();
   while(c<'0'||c>'9')f|=c=='-',c=getchar();
   while(c>='0'&&c<='9')x=(x<<1)+(x<<3)+(c^48),c=getchar();
   x=f?-x:x;
}
inline void print(long long x)
{
    if(x<0){
        putchar('-');
        x=-x;
    }
    if(x>9) print(x/10);
    putchar(x%10+'0');
}

//ofstream out("file.txt");
//ifstream in("file.txt"); 
inline int kpow(int x,int y){
	if(y==0)return 1;
	if(x==0)return 0;
	long long res =1;
	long long p=x;
	for(int i=0;y>>i;++i){
		if((y>>i)&1){
			res*=p;
			res%=mod;
		}
		p*=p;
		p%=mod;
	}
	return res;
}