a-do aaaa aaab aaad aaaf aaar aaba aabb aabd aabt aada aadt aafa aafb aafd aaff aaoo aara aard aaro aart aata aatf aatt abaa abab abad abaf abar abat abb- abba abbb abbo abbr abbt abda abdo abff aboa abob abod abof aboo abor abot abra abro abta adaa adab adad adao adar adat adba adda addd addo addr adfa adob adod adoo ador adot adra adro adta afaa afad afao afar afat afdb affa affo afft afoa afoo afor afr- afra afro afta aoba aora aorb aort aotd aotf arab arad araf arar arat arba arda ardf ardo arfa arfb arff arft aroa arob arod aroo aror arr- arra arro arrr arrt arta arto artr at-t ataa atab atad atar atat atdt atfb atob atod atof ator atot atra atro atta atto attr baaa baad baaf baar baat baba babb babo babr bada badb badd bado badr baff bafo baft bar- bara barb bard barf baro barr bart bata batf bato batt bbad bbbb bbdd bbdo bd-r bfta bftt boab boad boar boat boba bobb bobo boda bodb bodo bofa bofd boff boob bood boof boor boot bor- bora bord borf boro borr bort bota botb botd boto bott brab brad braf brao brat brda brdo brdt broa brob brod broo bror brot brrr btaa btaf btdt btob btor btrt bttb d-bo daab daad daar daba dabb dabo dabt dada dado dafa daff dafo daft dara darb dard darf daro darr dart data dato datr datt dbar dbfo dbtt dddd ddot dfaf dfdt dffa dfrf dftr doab doar doat doba dobb dod- doda dodd dodo doff doob dood doof door doot dora dord dorf doro dorr dort dota dotd doto dott draa drab drad draf drar drat drba drda drob drod drof drot drra dtaa dtor dtot faaa faad faba fabd fabo fada fadd fado fafa faff fafo fara farb fard faro farr fart fata fatf fato fatt fbar fdoa fdot ffar ffff ffrr fftf foad foaf foar foba fobt foda fofo food foof foot for- fora forb ford foro forr fort fota foto fott frab frad frat frob frot frta oafo oara obad obba obbo obdt obor obot obra obro obtd odbo odda oddd odoo odor odot odra ofdr off- offa offo offr ofor ofra ofta ooaa ooba ooda ooff oooo oora oord oort ootb orab orad orao orar orat orba orbb orbo orda ordo orff oro- orof oror orot orra orro orta orto otar otbd oto- otof otoo otor otra otro otta otto raab raad raaf raat raba rabb rabo rada radd rado radr radt rafa raff raft raob rara rarb rarf raro rata ratf rato ratt rbaf rbbb rbbr rdfa roab road roaf roar roat rob- roba robb robo robt roda rodd rodo roff rofo roob rood roof roor root rora roro rort rota roto rotr rott rrad rrat rrrr rtbf rtdt rtfb taa- taaf taar taat taba tabb tabo tada tado tafa taff tafo taft taoa taor tara tarb tard tarf taro tarr tart tata tatb tato tatr tatt tbaf tbar tbrb tbta tddb tdff tdor tdra tfot toab toad toat toba tobo tobt toda todd todo todt tofa toff tofo toft tooa tood toof toor toot tora tord torf toro torr tort tota totd toto totr tott traa trab trad traf trao trat trfd trfr troa trod troo trot trra trtr ttab ttbb ttfa ttff tttt