#include <bits/stdc++.h>
using namespace std;
using ll = long long;

void fast_io() {
  cin.tie(nullptr)->sync_with_stdio(false);
}

void solve() {
  int A[3], B;
  cin >> A[0] >> A[1] >> A[2] >> B;
  cout << max(3 * A[2], A[0] + A[1] + A[2] + B) << '\n';
}

int main() {
  fast_io();

  int t = 1;
  // cin >> t;
  while (t--) solve();
}