a-be aaaa aaab aaae aaaf aaal aaba aabb aabl aaea aafa aafb aaff aafl aala aale aall abaa abab abae abaf abal abb- abba abbb abbe abee abel abff abla able aeaf aela afaa afee afel affa afla afle alaa alae alal alb- alba albe alea alee alef alfa alfe all- alla alle alll baaa baaf baal baba babb babe bael baff bala bale balf ball bbbb bbeb bblb beaf beal beba bebb bebe beeb beef beel befa befe beff bela bele bell bffl blaa blab blae blea bleb blee e-la eaaf eaba eafb eala eale ebal ebba ebel ebla eeea eeee eefa eefe eefl eele efab effa efla el-b elab elal elba elbe elea elee elef elfa elfe ella elle faaa faba fabe faeb fafa fafe faff fala fale fall fbla fble feaf feal feba feeb feel fefe feff fela fele felf fell ffee ffff flab flae flea flee laaa laal laba labe lael lafb lafe laff lala lale lall leaa leaf leal leba leea leef leel lefa lefe leff lela lele lell llef llll