#include <bits/stdc++.h>
#define all(vec) vec.begin(), vec.end()
#define pb push_back
#define eb emplace_back
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
template <class T>
using V = vector<T>;
constexpr ll INF = (1LL << 30) - 1LL;
constexpr ll MOD = 998244353LL;
constexpr int dx[4] = {0, 1, 0, -1}, dy[4] = {1, 0, -1, 0};
template <class T>
void chmin(T &a, T b) { a = min(a, b); }
template <class T>
void chmax(T &a, T b) { a = max(a, b); }
void debug() { cerr << "ok" << endl; }
template <class T>
void vout(const vector<T> &v) {
    for (int i = 0; i < v.size(); i++) {
        cout << v[i] << (i + 1 == v.size() ? '\n' : ' ');
    }
}
int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int d1, d2;
    cin >> d1 >> d2;
    if (d1 * 2 < d2 || d1 > d2) {
        cout << 0 << '\n';
    } else if (d1 * 2 == d2 || d1 == d2) {
        cout << 4 << '\n';
    } else {
        cout << 8 << '\n';
    }
}