#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef unsigned long long int ull;
#define endl "\n"
#define IOS ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define int ll
const int N=200100;
const int mod=1e9+7;
const int inf=0x3f3f3f3f;
typedef pair<int,int> pii;
void dfs(double a,double b,vector<int> v){
    if(v.size()>50) return ;
    if(fabs(a-b)<=1e-5){
        for(auto t:v) cout<<t;
        exit(0);
    }
    vector<int> g=v; g.push_back(1);
    dfs(a*0.5,b,g);

    g=v; g.push_back(2);
    dfs((a-1.0)*0.5+1.0,b,g);
}
void solve(){
    double a,b; cin>>a>>b;
    vector<int> v;
    dfs(a,b,v);
}
signed main(){
    IOS;
    int _=1;
    //cin>>_;
    while(_--){
        solve();
    }
}