import sys
input = sys.stdin.buffer.readline
sys.setrecursionlimit(10 ** 7)

N = int(input())

# ABC[0,1,2] 底面の辺(short,long), 高さ
ABC = []
for _ in range(N):
    a, b, c = map(int, input().split())
    a, b, c = sorted([a, b, c])
    ABC.append(((a, b, c), (b, c, a), (a, c, b)))

# dp[使用した箱の集合][一番上の箱][底面がどれか] の高さの最大値
dp = [[[-1] * 3 for _ in range(N)] for _ in range(1 << N)]
for i, abc in enumerate(ABC):
    for j in range(3):
        dp[1 << i][i][j] = abc[j][2]

for bit in range(1, 1 << N):
    for i in range(N):
        if ~(bit >> i) & 1:  # 一番上の箱はi
            continue
        for j, (se1, le1, _) in enumerate(ABC[i]):
            if dp[bit][i][j] == -1:
                continue  # この積み方はぞんざいしない
            for k in range(N):  # 上に積む箱はj
                if (bit >> k) & 1:
                    continue  # 既に積んでる
                bit_next = bit | (1 << k)
                for l, (se2, le2, h) in enumerate(ABC[k]):
                    if se1 >= se2 and le1 >= le2:
                        dp[bit_next][k][l] = max(dp[bit_next][k][l], dp[bit][i][j] + h)

ans = max(max(max(d for d in dp)))
print(ans)