#include<iostream>
#include<iomanip>
#include<cmath>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#include<queue>
#include<stack>
using namespace std;
typedef long long ll;
#define fi first
#define se second
#define mp make_pair
const int inf=1e9+7;
const ll mod=1e9+7;

int main() {
    int D1, D2;
    cin>>D1>>D2;
    if(D2<D1)cout<<0<<endl;
    else if(D2==D1)cout<<4<<endl;
    else if(D2 < 2*D1) cout<<8<<endl;
    else if(D2 == 2*D1) cout<<4<<endl;
    else cout<<0<<endl;
}