import Control.Monad (guard)

main :: IO ()
main = mapM_ (putStrLn . unwords . map show) . solve =<< readLn

solve :: Int -> [[Int]]
solve n = do
    a <- [1 .. n `div` 3]
    b <- [a .. n * 2 `div` 3]
    guard $ b <= n - a - b
    return [a, b, n - a - b]