#include<bits/stdc++.h>
#define ll long long
#define alls(x) x.begin(),x.end()
#define ull unsigned long long
#define lowbit(x) x&-x
#define lc p<<1
#define rc p<<1|1
#define PII pair<int,int>
#define vi vector<int>
using namespace std;
const int mod = 998244353;
const int N = 2e5+10;
void solve()
{
    long double a,b;
    cin >> a >> b;
    long double aa = a,bb = b;
    string ans = string(16,'1');
    vector<long double>c(16);
    double x = 1;
    for(int i = 0;i<16;i++)
    {
        c[i] = 1.0/x;
        x*=2;
    }
    vector<int>v;
    for(int i = 1;i<16;i++)
    {
        if(b>c[i])
        {
            v.emplace_back(i);
            b-=c[i];
        }
    }
    reverse(alls(ans));
    for(auto i:v)
    {
        ans[i-1] = '2';
    }
    reverse(alls(ans));
    cout<<ans<<'\n';
//    for(auto i:ans)
//    {
//        if(i=='1')aa = aa*0.5;
//        else aa = aa*0.5+0.5;
//    }
//    cout<<aa<<'\n';
}
signed main()
{
    cout<<fixed<<setprecision(6);
    ios::sync_with_stdio(false),cin.tie(nullptr),cout.tie(nullptr);
    int _ = 1;
//    cin >> _;
    while(_--)solve();
}