import sys

sys.setrecursionlimit(10**6)
int1 = lambda x: int(x)-1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.buffer.readline())
def LI(): return list(map(int, sys.stdin.buffer.readline().split()))
def LI1(): return list(map(int1, sys.stdin.buffer.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def BI(): return sys.stdin.buffer.readline().rstrip()
def SI(): return sys.stdin.buffer.readline().rstrip().decode()
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
dij = [(0, 1), (1, 0), (1, 1), (1, -1)]
inf = 10**16
# md = 998244353
md = 10**9+7

def tohwt(i, j):
    a, b, c = abc[i]
    if j == 0: return a, b, c
    if j == 1: return a, c, b
    return b, c, a

n = II()
abc = []
for _ in range(n):
    aa = LI()
    aa.sort()
    abc.append(aa)
# print(abc)

to = [[] for _ in range(3*n+2)]
for i in range(n):
    for ni in range(n):
        if ni == i: continue
        for j in range(3):
            H, W, T = tohwt(i, j)
            u = i*3+j
            for nj in range(3):
                h, w, t = tohwt(ni, nj)
                if h > H or w > W: continue
                v = ni*3+nj
                to[u].append((v, t))
for i in range(n):
    for j in range(3):
        u = i*3+j
        h, w, t = tohwt(i, j)
        to[n*3].append((u, t))
        to[u].append((n*3+1, 0))

fin = [False]*n
def dfs(u):
    if u == n*3+1: return 0
    i = u//3
    if i < n: fin[i] = True
    res = 0
    for v, c in to[u]:
        if v != n*3+1 and fin[v//3]: continue
        cur = dfs(v)+c
        res = max(res, cur)
    if i < n: fin[i] = False
    return res

print(dfs(n*3))