long longer the longest.Так же нужно сделать со следующими словами:bright difficult good happy lazy hot bad big silly interesting

bright-brighter- the brightest
difficult-more difficult-most difficultgood-better-(the) best
happy-happier-happiest
lazy-lazier-laziest
hot-hotter- most hot
bad-worse- worst
big-bigger - biggest
silly-sillier-silliest
interesting-more interesting -most interesting