include

include

include

using namespace std;

int main() { int t; cin >> t;

while (t--) {
    int n;
    cin >> n;

    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }

    vector<int> b(n);
    for (int i = 0; i < n; i++) {
        cin >> b[i];
    }

    vector<int> c(n);
    for (int i = 0; i < n; i++) {
        cin >> c[i];
    }

    vector<int> d(n);
    for (int i = 0; i < n; i++) {
        cin >> d[i];
    }

    sort(a.begin(), a.end());
    sort(b.begin(), b.end());
    sort(c.begin(), c.end());
    sort(d.begin(), d.end());

    int ans = 0;
    for (int i = 0; i < n; i++) {
        ans += min(min(a[i], b[i]), min(c[i], d[i]));
    }

    cout << ans << endl;
}

return 0;

}