a-be a-do aaaa aaab aaad aaae aaba aabb aabd aabt aada aade aadt aadu aaea aaoe aaoo aata aatt abaa abab abad abae abat abau abb- abba abbb abbe abbo abbt abda abdo abdu abed abee abet aboa abob abod aboo abot abou abta abtu abua abud abue abut adaa adab adad adae adao adat adba adda addd adde addo addu adea adeb adee adeo adet adob adod adoe adoo adot adta adua adub adue aede aedt aeta aeto aett aoba aoeu aotd aout at-t ataa atab atad atae atat atdt atea ated atee ateo atob atod atoe atot atta atte atto attu atua atub auaa aube aude audo aut- aute auto baaa baad baat baba babb babe babo babu bada badb badd bade bado badu baed bata bate bato batt batu bau- baud bbad bbau bbbb bbdd bbdo bbeb bbet bead beat beau beba bebb bebe bebo beda bede bedo bedu beeb beed beet beo- beod beot beta bete beto bett betu boab boad boat boba bobb bobe bobo bobu boda bodb bode bodo bodu boea boee boeo boet boob bood booe boot bota botb botd bote boto bott boua boud boue bout btaa btdt btob bttb buad buat buba bubb bube bubo bubu buda budb budd bude budo budu buea bueu but- buta bute buto butt d-bo daab daad daae daau daba dabb dabo dabt dabu dada dade dado dadu daeb daeu daou data date dato datt datu daub daud daue daut dbtt dddd ddot ddub dead deae deau deba debe debt debu deda dedd dede dedo dedu deeb deed deet deta dete deto deua deue deut doab doae doat doba dobb dobe dobu dod- doda dodd dode dodo doea doob dood doot dota dotd dote doto dott doub doud doue dout dtaa dted dtot duaa duab duad duat dub- duba dubb dube dubu duda dudd dude dudo dudu duet duo- duta dute duut eaba eada eadb eadd eata eate ebba ebbo ebed eboe eboo edad edda edde eddo ede- edea edod edou edta eede eedu eeea eeee eeta eete eetu eode eota eotd eoto etat etee etoe etta ette etto ettu etua euba eude o-eo oaau oade oate obad obba obbo obdt obea obed obet oboe obot obtd odbo odda oddd odea oded odeo odet odoo odot odou odtu oedo oeta ooaa ooba oobe ooda oooo ootb otbd otea oted otee oto- otoe otoo otta otte otto ottu ouad ouat oude ouea oued out- outa outb oute outo ouu- taa- taat taba tabb tabe tabo tabu tada tade tado taoa taou tata tatb tate tato tatt tatu taua taub taue taut tbta tddb tead teat teba tebo tebu teda tedd tede teed teet teta tete teto tett tetu teut toab toad toat toau toba tobe tobo tobt tobu toda todd tode todo todt todu toea toed toee toet tooa tood toot tota totd tote toto tott tout ttab ttbb tteo ttoe tttt tuae tuao tuat tuba tubb tube tubo tubu tude tudu tuet tuta tute tuto tutt tutu tuuo uata uatu uaua ubba ubbe ubbo ubet ubod ubud udaa udad udau udea udet udoo udot ueba ueda utau utto uttu uuta uuuu