#include <bits/stdc++.h>
#ifdef _DEBUG
#include "debug.hpp"
#else
#define debug(...)
#endif
#define REP(i, m, n) for(int i = (int)(m); i < (int)(n); ++i)
#define rep(i, n) REP(i, 0, n)
using namespace std;
using ll = long long; using ld = long double; using pll = pair<ll, ll>;
const int INF = 1<<30; const ll LINF = 1LL<<60; const ld PI = 3.1415926535897932;
template<class T, class U> inline bool chmax(T &a, const U &b) { if(a < b) { a = b; return true; } return false; }
template<class T, class U> inline bool chmin(T &a, const U &b) { if(a > b) { a = b; return true; } return false; }



signed main() {
  cin.tie(0); ios::sync_with_stdio(false);
  ld d1, d2;
  cin >> d1 >> d2;
  if(d1 == d2 || d2 == 2.0*d1) cout << 4 << '\n';
  else if(d2 < 2.0*d1 && d1 < d2) cout << 8 << '\n';
  else cout << 0 << '\n';
  return 0;
}