#include<bits/stdc++.h>

using namespace std;

double eps = 0.0001;

void solve(){
	double a,b;
	cin>>a>>b;
	int cnt = 0;
	while(abs(a-b)>eps){
		if(a>b){
			cout<<1;
			a=a*0.5;
			cnt++;
		}else{
			cout<<2;
			a=a*0.5+0.5;
		}
	}
	cout<<"\n";
	//cout<<cnt<<"\n";
}

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0),cout.tie(0);
	int t=1;
	//cin>>t;
	while(t--){
		solve();
	}
	return 0;
}