N = int(input())
ABC = [tuple(map(int, input().split())) for _ in range(N)]
L = [[] for _ in range(N)]

for i in range(N):
    L[i].append((0, ABC[i][0], ABC[i][1], ABC[i][2]))
    L[i].append((1, ABC[i][0], ABC[i][2], ABC[i][1]))
    L[i].append((2, ABC[i][1], ABC[i][0], ABC[i][2]))
    L[i].append((3, ABC[i][1], ABC[i][2], ABC[i][0]))
    L[i].append((4, ABC[i][2], ABC[i][0], ABC[i][1]))
    L[i].append((5, ABC[i][2], ABC[i][1], ABC[i][0]))

dp = [[[0]*6 for _ in range(N)] for _ in range(1<<N)]

for i in range(N):
    for j, _, _, l3 in L[i]:
        dp[1<<i][i][j] = l3

for S in range(1, 1<<N):
    for i in range(N):
        if (S>>i)&1:
            for j in range(N):
                if not (S>>j)&1:
                    for k, pl1, pl2, _ in L[i]:
                        for l, l1, l2, l3 in L[j]:
                            if l1<=pl1 and l2<=pl2:
                                dp[S|(1<<j)][j][l] = max(dp[S|(1<<j)][j][l], dp[S][i][k]+l3)

ans = 0

for i in range(N):
    for j in range(6):
        ans = max(ans, dp[-1][i][j])

print(ans)