#include "bits/stdc++.h"
using namespace std;
//#define int long long
#define FOR(i, a, b) for(int i=(a);i<(b);i++)
#define RFOR(i, a, b) for(int i=(b-1);i>=(a);i--)
#define REP(i, n) for(int i=0; i<(n); i++)
#define RREP(i, n) for(int i=(n-1); i>=0; i--)
#define REP1(i, n) for(int i=1; i<=(n); i++)
#define RREP1(i, n) for(int i=(n); i>=1; i--)
#define ALL(a) (a).begin(),(a).end()
#define UNIQUE_SORT(l) sort(ALL(l)); l.erase(unique(ALL(l)), l.end());
#define CONTAIN(a, b) find(ALL(a), (b)) != (a).end()
#define out(...) printf(__VA_ARGS__)
#define chmax(a,b) a = max(a,b)
#define chmin(a,b) a = min(a,b)
#if DEBUG
#define debug(...) printf(__VA_ARGS__)
#else
#define debug(...) /* ... */
#endif

void solve();
signed main()
{
#if DEBUG
    std::ifstream in("input.txt");
    std::cin.rdbuf(in.rdbuf());
#endif
    cin.tie(0);
    ios::sync_with_stdio(false);
    solve();
    return 0;
}

/*================================*/
#if DEBUG
#define SIZE 5
#else
#define SIZE 16
#endif

int N,M,Q;
// bitDP, 横, 縦 → 最大高さ (横>=縦)
int DP[1LL<<SIZE][SIZE*3][SIZE*3];
int V[SIZE][3];
vector<int> S;

void solve() {
    cin>>N;
    REP(i,N)REP(j,3) {
        cin>>V[i][j];
        S.push_back(V[i][j]);
    }
    UNIQUE_SORT(S);
    REP(i,N)REP(j,3) {
        V[i][j] = lower_bound(ALL(S), V[i][j])-S.begin();
    }
    REP(i,1LL<<N)REP(j,N)if(!(1LL<<j & i)) {
        REP(n,S.size())REP(m,n+1)if(!i || DP[i][n][m]) {
            REP(k,3) {
                int w = max(V[j][k], V[j][(k+1)%3]);
                int h = min(V[j][k], V[j][(k+1)%3]);
                int v = S[V[j][(k+2)%3]];
                if (w <= n && h <= m) {
                    chmax(DP[i|(1LL<<j)][w][h], DP[i][n][m]+v);
                    debug("DP[%2lld][%2lld][%2lld] = %lld\n",i+(1LL<<j),w,h,DP[i+(1LL<<j)][w][h]);
                }
            }
        }
    }
    int ans = 0;
    REP(i,1LL<<N)REP(n,S.size())REP(m,n+1) chmax(ans, DP[i][n][m]);
    cout << ans << endl;
}