#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
int dp[1 << 16][16][6];
bool vis[1 << 16][16][6];
vector<vector<int>> rot = {{0, 1, 2}, {0, 2, 1}, {1, 0, 2}, {1, 2, 0}, {2, 0, 1}, {2, 1, 0}};
vector<vector<int>> a;
int n;
bool canPut (int rb, int ru, int ib, int iu) {
  bool ok = true;
  for (int i = 0; i < 2; i++) {
    ok &= a[ib][rot[rb][i]] >= a[iu][rot[ru][i]];
  }
  return ok;
}
int rec (int cur, int top, int r) {
  if (cur == 0) return 0;
  if (!((cur >> top) & 1)) return -(1 << 30);
  int& res = dp[cur][top][r];
  if (vis[cur][top][r]) return res;
  vis[cur][top][r] = true;
  int pre = cur ^ (1 << top);
  for (int i = 0; i < n; i++) {
    if ((pre >> i) & 1) {
      for (int j = 0; j < 6; j++) {
        if (canPut(j, r, i, top)) {
          res = max(res, rec(pre, i, j) + a[top][rot[r][2]]);
        }
      }
    }
  }
  return res;
}
signed main() { 
  ios::sync_with_stdio(false); cin.tie(0);
  cin >> n;
  for (int i = 0; i < n; i++) {
    int x, y, z;
    cin >> x >> y >> z;
    a.push_back({x, y, z});
  }
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < 6; j++) {
      vis[1 << i][i][j] = true;
      dp[1 << i][i][j] = a[i][rot[j][2]];
    }
  }
  for (int i = 0; i < n; i++) for (int j = 0; j < 6; j++) {
    rec((1 << n) - 1, i, j);
  }
  int ans = 0;
  for (int i = 0; i < (1 << n); i++) for (int j = 0; j < n; j++) for (int k = 0; k < 6; k++) {
    ans = max(ans, dp[i][j][k]);
  }
  cout << ans << endl;
  return 0;
}