a-be aaaa aaab aaae aaal aaba aabb aabl aabt aaea aala aale aall aata aatt abaa abab abae abal abat abb- abba abbb abbe abbt abee abel abet abla able abta aela aeta aett alaa alae alal alat alb- alba albe alea alee alet all- alla alle alll alta alte at-l at-t ataa atab atae atal atat atea atee atel atla atle atta atte baaa baal baat baba babb babe bael bala bale ball balt bata bate batt bbbb bbeb bbet bblb beal beat beba bebb bebe beeb beel beet bela bele bell belt beta bete bett blaa blab blae blat blbt blea bleb blee blet btaa btla bttb e-la eaba eala eale eata eate ebal ebba ebel ebla eeea eeee eele eeta eete el-b elab elal elat elba elbe elea elee elet ella elle elta elte etal etat etee etel etla etta ette laaa laal laat laba labe lael laet lala lale lall lata late latt leaa leal leat leba leea leel leet lela lele lell leta lete lett llat llet llll ltae ltbl ltee taa- taal taat taba tabb tabe tabl tael tala tale tall tata tatb tate tatt tbta teal teat teba teel teet tel- tela tele tell telt teta tete tett ttab ttbb tttt