import Data.List

main = do
 [n,_] <- map read . words <$> getLine
 ijss <- map (map read . words) . lines <$> getContents
 print (vmax n (map (\[i,j,s]->((i,j),s)) ijss))

vmax n ijss = maximum $ map (score ijss) (permutations [0..n-1])

score ijss ns = foldr (\(_,s) acc -> s+acc) 0 (filter ok ijss)
 where ok ((i,j),_) = filter (\x -> x==i || x==j) ns == [i,j]