#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
const ll N = 1e6 + 5;
const ll mod = 1e9 + 7;
typedef double db;
const double eps = 1e-6;
#define endl '\n'
#define PII pair<ll, ll>
#define fi first
#define se second

ll arr[N];
ll n, m, k;
ll ans;
ll q;
double a, b;
bool f;
string s;
void dfs(double x, ll t)
{
    if (t >= 23)
        return;
    if (abs(x - b) <= 1e-4)
    {
        f = 1;
        return;
    }
    dfs(x * 0.5, t + 1);
    if (f)
    {
        s = "1" + s;
        // cout << x * 0.5 << " ";
        return;
    }
    dfs(x * 0.5 + 0.5, t + 1);
    if (f)
    {
        s = "2" + s;
        // cout << x * 0.5 + 0.5 << " ";
        return;
    }
}
void solve()
{
    cin >> a >> b;
    // cout << a << " ";
    dfs(a, 0);
    cout << s;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    ll t = 1; // cin>>t;
    while (t--)
        solve();
    return 0;
}