a-be a-do aaaa aaab aaac aaad aaae aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aaco aact aada aadc aade aadt aaea aaec aaoe aaoo aata aatc aatt abaa abab abac abad abae abat abb- abba abbb abbe abbo abbt abca abcb abcc abcd abct abda abdo abec abed abee abet aboa abob abod aboo abot abta ac-t acaa acab acac acad acae acat acba acca accc accd acce acco acct acda acdb acdc acde acdt ace- acea acec aced acet acoa acod acoe acot acta actc acte acto actt adaa adab adac adad adae adao adat adba adbc adcc adda addc addd adde addo adea adeb adee adeo adet adob adoc adod adoe adoo adot adta aeac aecb aect aede aedt aeta aetc aeto aett aoba aoca aoce aotc aotd at-t ataa atab atac atad atae atat atca atcc atco atdt atea atec ated atee ateo atob atoc atod atoe atot atta atte atto baaa baad baat baba babb babe babo bac- baca bacc bace baco bact bada badb badd bade bado baed bata batc bate bato batt bbad bbbb bbdd bbdo bbeb bbet bcaa bcat bcbc bcca bccc bcda bcde bcec bcet bctc bdbc bddc bead beat beba bebb bebe bebo beca beda bede bedo beeb beed beet beo- beod beot beta betc bete beto bett boab boac boad boat boba bobb bobe bobo boca boce boco boda bodb bode bodo boea boec boee boeo boet boob booc bood booe boot bota botb botd bote boto bott btaa btcc btdt btec btob bttb c-bo c-cd caaa caab caac caat caba cabe cabo cac- caca cacc cace caco cada cadc cadd cade cado caec caod cat- cata catb catc catd cate cato catt cbac cbat cbbc cbca cbcc cbce cbct cbdb cbdc cbdo cbea cbec cbee cbet cbot cbta cbtc ccaa ccab ccac ccad ccat ccba ccbc ccca cccb cccc ccdc cced ccee ccob ccoc ccod cctb cctc cctt cd-e cdaa cdac cdad cdba cdda cddb cdec cdot ceac cead ceat ceba cec- ceca cece ceco cect ceda cedd cede cedo cedt ceeb ceec cet- ceta cete ceto coad coat coba cobb cobe cobo coca coce coco coct coda codd code coed coob cood coot cota cotb cotc cote coto cott ctab ctae ctba ctca ctec ctot ctta d-bo daab daad daae daba dabb dabo dabt daca dace dact dada dade dado daeb data date dato datt dbcc dbtt dcbc dcca dccb dccc dcct dcdb dctc dddd ddoc ddot deac dead deae deba debe debt dec- deca decc decd dece deco dect deda dedd dede dedo deeb deed deet deta dete deto doab doae doat doba dobb dobe doca doce doco doct dod- doda dodd dode dodo doea doob dood doot dota dotd dote doto dott dtaa dtac dtcc dted dtot eaba eaca eacc eada eadb eadd eaec eata eate ebac ebba ebbc ebbo ebcc ebed eboe eboo ecaa ecac ecad ecao ecat ecbc ecbe ecca eccb eccc ecce ecco ecct ecdc eced eco- ecod ecot ect- ecta ectc ecto edac edad edca edda eddc edde eddo ede- edea edoc edod edta eeca eede eeea eeee eeoc eeta eetc eete eocd eode eota eotc eotd eoto etat etbc etcc etco etec etee etoe etta ette etto o-eo oade oate obad obba obbo obdt obea obec obed obet oboe obot obtd ocab ocac ocad ocat ocbc occa occc occt oce oced ocee ocet oct- octa octe octo odac odbo odda oddd odea oded odeo odet odoo odot oec- oeca oecc oedo oeec oeta ooaa ooba oobe ooda oooo ootb otac otbd otcd otea oted otee oto- otoe otoo otta otte otto taa- taat taba tabb tabc tabe tabo taca tacc tace taco tact tada tade tado taec taoa tata tatb tate tato tatt tbca tbcb tbcc tbcd tbce tbta tcad tcca tccc tcdd tctc tdac tddb teac tead teat teba tebo teca teco tect teda tedd tede teec teed teet teta tete teto tett toab toad toat toba tobe tobo tobt toca toce toco toda todd tode todo todt toea toed toee toet tooa tood toot tota totc totd tote toto tott ttab ttbb tteo ttoe tttt