#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
#define ull unsigned long long
using PII = pair<int, int>;
using ld = long double;
const int N = 2e5 + 5, M = 998244353;
 
typedef __int128 lll;
istream &operator>>(istream &cin, lll &x) { x=0; static string s; cin>>s; for (char c:s) x=x*10+(c-'0'); return cin; }
ostream &operator<<(ostream &cout, lll x) { static char s[60]; int tp=1; s[0]='0'+(x%10); while (x/=10) s[tp++]='0'+(x%10); while (tp--) cout<<s[tp]; return cout; }
 
mt19937_64 rng{ chrono::steady_clock::now().time_since_epoch().count() };

void solve() {
    float a, b;
    cin >> a >> b;
    string s;
    for (int i = 1;i <= 10;i++) {
        a = (a - 1) * 0.5 + 1;
        s += '2';
    }
    int cnt = 0;
    string tmp;
    while (fabs(a - b) > 1e-4) {
        if (b > 0.5) {
            b = 2 * b - 1;
            tmp += '2';
        }
        else {
            b = 2 * b;
            tmp += '1';
        }
        cnt++;
        if (cnt == 40)break;
    }
    reverse(tmp.begin(), tmp.end());
    s += tmp;
    cout << s << endl;
}
 
signed main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int tt = 1;
    // cout << fixed << setprecision(5);
    // cin >> tt;
    while (tt--)solve();
}