#include<bits/stdc++.h>
using namespace std;
using ld=long double;
signed main(){
ld a, b; cin >> a >> b;
	if (a < b / 2) {
		cout << 0 << endl;
	}
	else if (a == b / 2) cout << 4 << endl;
	else cout << 8 << endl;
}