a-be a-do aaaa aaab aaad aaae aaba aabb aabd aabt aada aade aadt aaea aaoe aaoo aata aatt abaa abab abad abae abat abb- abba abbb abbe abbo abbt abda abdo abed abee abet aboa abob abod aboo abot abta adaa adab adad adae adao adat adba adda addd adde addo adea adeb adee adeo adet adob adod adoe adoo adot adta aede aedt aeta aeto aett aoba aotd at-t ataa atab atad atae atat atdt atea ated atee ateo atob atod atoe atot atta atte atto baaa baad baat baba babb babe babo bada badb badd bade bado baed bata bate bato batt bbad bbbb bbdd bbdo bbeb bbet bead beat beba bebb bebe bebo beda bede bedo beeb beed beet beo- beod beot beta bete beto bett boab boad boat boba bobb bobe bobo boda bodb bode bodo boea boee boeo boet boob bood booe boot bota botb botd bote boto bott btaa btdt btob bttb d-bo daab daad daae daba dabb dabo dabt dada dade dado daeb data date dato datt dbtt dddd ddot dead deae deba debe debt deda dedd dede dedo deeb deed deet deta dete deto doab doae doat doba dobb dobe dod- doda dodd dode dodo doea doob dood doot dota dotd dote doto dott dtaa dted dtot eaba eada eadb eadd eata eate ebba ebbo ebed eboe eboo edad edda edde eddo ede- edea edod edta eede eeea eeee eeta eete eode eota eotd eoto etat etee etoe etta ette etto o-eo oade oate obad obba obbo obdt obea obed obet oboe obot obtd odbo odda oddd odea oded odeo odet odoo odot oedo oeta ooaa ooba oobe ooda oooo ootb otbd otea oted otee oto- otoe otoo otta otte otto taa- taat taba tabb tabe tabo tada tade tado taoa tata tatb tate tato tatt tbta tddb tead teat teba tebo teda tedd tede teed teet teta tete teto tett toab toad toat toba tobe tobo tobt toda todd tode todo todt toea toed toee toet tooa tood toot tota totd tote toto tott ttab ttbb tteo ttoe tttt