#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;
    string ans;
    while(fabs(a-b)>=1e-4)
    {
        if(a>b)
        {
            a = a*0.5;
            ans+='1';
        }
        else
        {
            a = a*0.5+0.5;
            ans+='2';
        }
    }
    cout<<ans<<'\n';
}
signed main()
{
    cout<<fixed<<setprecision(6);
    ios::sync_with_stdio(false),cin.tie(nullptr),cout.tie(nullptr);
    int _ = 1;
//    cin >> _;
    while(_--)solve();
}