mod = 1000000007
eps = 10**-9
inf = 10**9


def main():
    import sys
    input = sys.stdin.readline

    N = int(input())
    xyz = []
    val = set()
    for i in range(N):
        a, b, c = map(int, input().split())
        x, y, z = sorted([a, b, c])
        xyz.append((x, y, z, i))
        xyz.append((x, z, y, i))
        xyz.append((y, z, x, i))
        val.add(x)
        val.add(y)
        val.add(z)
    val.add(0)
    val = sorted(list(val))
    val2idx = {v: i for i, v in enumerate(val)}

    xyz.sort(key=lambda p: p[1])
    dp = [[[-inf] * (N*3+1) for _ in range(2**N)] for _ in range(N * 3 + 1)]
    dp[0][0][0] = 0
    for i in range(N*3):
        x, y, z, ii = xyz[i]
        j = val2idx[x]
        for state in range(2**N):
            for last in range(N*3+1):
                dp[i+1][state][last] = max(dp[i+1][state][last], dp[i][state][last])
                if not state >> ii & 1:
                    if last <= j:
                        dp[i+1][state | (1 << ii)][j] = max(dp[i+1][state | (1 << ii)][j], dp[i][state][last] + z)
    ans = 0
    for state in range(2**N):
        for last in range(N*3+1):
            ans = max(ans, dp[-1][state][last])
    print(ans)


if __name__ == '__main__':
    main()