#include <bits/stdc++.h>
#define REP(i, start, end) for (int64_t i=start, i##Len=(end); i < i##Len; ++i)
#define REPR(i, start, end) for (int64_t i=start, i##Len=(end); i > i##Len; --i)
using ll = int64_t;
using namespace std;


int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(20);

    ll N;
    cin >> N;
    vector<tuple<ll, ll, ll>> box;
    ll x, y, z;
    REP(i, 0, N) {
        cin >> x >> y >> z;
        box.emplace_back(x, y, z);
    }
    ll bit_max = 1;
    REP(i, 0, N) bit_max *= 3;
    ll ans = 0;

    REP(bit, 0, bit_max) {
        ll b = bit;
        vector<tuple<ll, ll, ll>> box2;
        REP(i, 0, N) {
            tie(x, y, z) = box[i];
            switch (b % 3) {
                case 0:
                    box2.emplace_back(max(y, z), min(y, z), x);
                    break;
                case 1:
                    box2.emplace_back(max(x, z), min(x, z), y);
                    break;
                case 2:
                    box2.emplace_back(max(x, y), min(x, y), z);
                    break;
            }
            b /= 3;
        }

        unordered_map<ll, ll> dp1, dp2;
        dp1[100000000] = 0;
        sort(box2.begin(), box2.end(), greater<tuple<ll, ll, ll>>());

        REP(i, 0, N) {
            tie(x, y, z) = box2[i];
            for (auto p: dp1) {
                if (p.first >= y) dp2[y] = max(dp2[y], p.second + z);
                dp2[p.second] = max(dp2[p.second], dp1[p.second]);
            }
            swap(dp1, dp2);
        }
        for (auto p: dp1) ans = max(ans, p.second);
    }

    cout << ans << endl;

}