#include<bits/stdc++.h>
using namespace std;
#define ll long long
string ans; 
int main()
{
    double a,b;
    cin>>a>>b;
    int cnt=0;
    while(fabs(a-b)>1e-4&&cnt<=51)
    {
        if(a<b)
        {
            ans+='2';
            a=(a-1)*0.5+1;
            cnt++;
        }
        else
        {
            ans+='1';
            a=a*0.5;
            cnt++;
        }
    }
    cout<<ans<<endl;
    return 0;
}