#region Header
#!/usr/bin/env python3
# from typing import *

import sys
import io
import math
import collections
import decimal
import itertools
import bisect
import heapq


def input():
    return sys.stdin.readline()[:-1]


# sys.setrecursionlimit(1000000)
#endregion

# _INPUT = """2
# 2 7 3
# 5 1 4
# """
# sys.stdin = io.StringIO(_INPUT)

def is_loadable(lower1, lower2, upper1, upper2):
    return max(lower1, lower2) >= max(upper1, upper2) and min(lower1, lower2) >= min(upper1, upper2)


def main():
    N = int(input())
    Box = []
    for i in range(N):
        a, b, c = map(int, input().split())
        Box.append((a, b, c))

    Loadable = [[list() for _ in range(3)] for _ in range(N)]
    for i1 in range(N):
        for k1 in range(3):
            for i2 in range(N):
                if i2 == i1:
                    continue
                for k2 in range(3):
                    if is_loadable(Box[i1][(k1+1)%3], Box[i1][(k1+2)%3], Box[i2][(k2+1)%3], Box[i2][(k2+2)%3]):
                        Loadable[i1][k1].append((i2, k2))

    dp = [[[0] * 3 for _ in range(N)] for _ in range(1<<N)]
    
    ans = 0
    for i in range(N):
        for k in range(3):
            dp[1<<i][i][k] = Box[i][k]
            ans = max(ans, dp[1<<i][i][k])

    for s1 in range(1, 1<<N):
        for i1 in range(N):
            if not(s1 & (1<<i1)):
                continue

            for k1 in range(3):
                for i2, k2 in Loadable[i1][k1]:
                    if s1 & (1<<i2):
                        continue
                    s2 = s1 | (1<<i2)
                    dp[s2][i2][k2] = max(dp[s2][i2][k2], dp[s1][i1][k1] + Box[i2][k2])
                    ans = max(ans, dp[s2][i2][k2])


    print(ans)

if __name__ == '__main__':
    main()