#include <bits/stdc++.h>

using namespace std;

int64_t solve(int64_t a1, int64_t b1, int64_t a2, int64_t b2, int64_t sm, int64_t di)
{
    return max({a1 + a2 + sm, a1 + b2 + di, b1 + a2 + di, b1 + b2 + sm});
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int N;
    cin >> N;
    vector<int> A(2 * N), B(2 * N), X(N), Y(N);
    for (int &a : A)
        cin >> a;
    for (int &b : B)
        cin >> b;
    for (int &x : X)
        cin >> x;
    for (int &y : Y)
        cin >> y;

    int64_t ans = 0;
    for (int i = 0; i < N; ++i)
    {
        ans += solve(A[2 * i], B[2 * i], A[2 * i + 1], B[2 * i + 1], X[i], Y[i]);
    }
    cout << ans << endl;
}