import sequtils,strutils,algorithm
var
    N, M, a, b, c: int
    hyou : array[16, array[16, int]]
    s : int
    ans : int
    dp : array[16, array[16, array[(1 shl 16), int]]]
(N, M) = stdin.readline.split.map(parseInt)
var
    used : array[17, bool]
for i in 0..<M:
    (a, b, c) = stdin.readline.split.map(parseInt)
    a -= 1
    b -= 1
    hyou[a][b] = max(hyou[a][b], c)
    hyou[b][a] = max(hyou[b][a], c)

for B in 0..<(1 shl N):
    for s in 0..<N:
        for g in 0..<N:
            if B == 0:
                var nb = ((1 shl s) or (1 shl g))
                dp[s][g][nb] = hyou[s][g]
                dp[g][s][nb] = hyou[g][s]
            if (B and (1 shl s)) > 0 and (B and (1 shl g)) > 0:
                for k in 0..<N:
                    if (B and (1 shl k)) > 0:
                        continue
                    var nb = ((1 shl k) or B)
                    dp[s][k][nb] = max(dp[s][k][nb], dp[s][g][B] + hyou[g][k])
                    dp[k][g][nb] = max(dp[k][g][nb], dp[s][g][B] + hyou[k][s])
                    ans = max(dp[k][g][nb], ans)
                    ans = max(dp[s][k][nb], ans)

echo ans