a-be a-do aaaa aaab aaad aaae aaaf aaar aaba aabb aabd aabt aada aade aadt aaea aafa aafb aafd aaff aaoe aaoo aara aard aare aaro aart aata aatf aatt abaa abab abad abae abaf abar abat abb- abba abbb abbe abbo abbr abbt abda abdo abed abee aber abet abff aboa abob abod abof aboo abor abot abra abro abta adaa adab adad adae adao adar adat adba adda addd adde addo addr adea adeb adee adeo ader adet adfa adob adod adoe adoo ador adot adra adre adro adta aeaf aede aedt aeer aer- aera aerd aero aeta aetf aeto aetr aett afaa afad afao afar afat afdb afee afer afet affa affo afft afoa afoe afoo afor afr- afra afre afro afta afte aoba aora aorb aort aotd aotf arab arad arae araf arar arat arba arbe arda arde ardf ardo area ared aree aref areo aret arfa arfb arff arft aroa arob arod aroe aroo aror arr- arra arre arro arrr arrt arta arte arto artr at-t ataa atab atad atae atar atat atdt atea ated atee atef ateo ater atfb atfe atob atod atoe atof ator atot atra atre atro atta atte atto attr baaa baad baaf baar baat baba babb babe babo babr bada badb badd bade bado badr baed baer baff bafo baft bar- bara barb bard bare barf baro barr bart bata bate batf bato batt bbad bbbb bbdd bbdo bbeb bbet bd-r bead beaf bear beat beba bebb bebe bebo beda bede bedo beeb beed beef beer beet befa befe beff befo beft beo- beod beof beor beot bera berd bere bero berr bert beta bete beto bett bfta bftt boab boad boar boat boba bobb bobe bobo boda bodb bode bodo boea boee boef boeo boer boet bofa bofd bofe boff boob bood booe boof boor boot bor- bora bord bore borf boro borr bort bota botb botd bote boto bott brab brad brae braf brao brat brda brdo brdt brea breb bred bree bref breo brer bret broa brob brod broe broo bror brot brrr btaa btaf btdt btob btor btrt bttb d-bo daab daad daae daar daba dabb dabo dabt dada dade dado daeb daer dafa dafe daff dafo daft dara darb dard dare darf daro darr dart data date dato datr datt dbar dbfo dbtt dddd ddot ddre dead deae deaf dear deba debe debt deda dedd dede dedo deeb deed deef deer deet defe deff defo deft deor der- dera derb dere derf dero derr deta dete deto detr dfaf dfdt dfer dffa dfoe dfrf dftr doab doae doar doat doba dobb dobe dod- doda dodd dode dodo doea doer doff doob dood doof door doot dora dord dore dorf doro dorr dort dota dotd dote doto dott draa drab drad draf drar drat drba drda drea dred dree dref dret drob drod drof drot drra dtaa dted dtor dtot eaaf eaba eada eadb eadd eafb eara earb eard eare earo eart eata eate ebba ebbo ebbr ebed eber eboe eboo ebor ebro edad edar edda edde eddo ede- edea eder edfa edod edra edta eede eeea eeee eefa eefe eera eero eeta eete efab efbr efda efeo efet effa efor eft- efta eode eora eore eota eotd eoto erad eraf erat erba erbb erbe erda erde erdf ereb ered erer eret erft erob erod eroe eroo erra erre erro erta etat etbr etee eter etfa etfb etfe etoe etra etre etro etta ette etto faaa faad faba fabd fabe fabo fada fadd fade fado faeb fafa fafe faff fafo fara farb fard fare faro farr fart fata fate fatf fato fatt fbar fdoa fdot fead feaf fear feat feba febo feda fede feeb feed feer feet fefe feff fefo feod feof fera ferb ferd fere fero ferr fert feta fete fetr fett ffar ffee ffff ffrr fftf foad foaf foar foba fobt foda fode foed foer fofo food foof foot for- fora forb ford fore foro forr fort fota fote foto fott frab frad frae frat frea fred free freo fret frob froe frot frta ftea fter o-eo oade oaer oafo oara oare oate obad obba obbo obdt obea obed ober obet oboe obor obot obra obre obro obtd odbo odda oddd odea oded odeo oder odet odoo odor odot odra oedo oera oere oeta ofdr ofer off- offa offe offo offr ofor ofra ofre ofta ooaa ooba oobe ooda ooer ooff oooo oora oord oore oort ootb orab orad orae orao orar orat orba orbb orbe orbo orda orde ordo ore- orea oreb ored oreo orer orfe orff oro- oroe orof oror orot orra orro orta orte orto otar otbd otea oted otee oter oto- otoe otof otoo otor otra otre otro otta otte otto raab raad raaf raat raba rabb rabe rabo rada radd rade rado radr radt raed raef raer rafa rafe raff raft raob rara rarb rare rarf raro rata rate ratf rato ratt rbaf rbbb rbbr rder rdfa rea- read reae reaf reao rear reat reba rebb rebe rebo reda redd rede redo redr reeb reed reef reet refd refe reff refr reft reod reof reot rera rerd rere rero rert reta retd rete reto retr rett rfae rfef roab road roaf roar roat rob- roba robb robe robo robt roda rodd rode rodo roea roed roer roet rofe roff rofo roob rood roof roor root rora rore roro rort rota rote roto rotr rott rrad rrat rred rrrr rtbf rtdt rtee rtfb taa- taaf taar taat taba tabb tabe tabo tada tade tado taer tafa tafe taff tafo taft taoa taor tara tarb tard tare tarf taro tarr tart tata tatb tate tato tatr tatt tbaf tbar tbrb tbta tddb tdff tdor tdra tead tear teat teba tebo teda tedd tede teed teef teer teet teff teft teor ter- tera tere terf tero terr teta tete teto tetr tett tfae tfeb tfot toab toad toat toba tobe tobo tobt toda todd tode todo todt toea toed toee toer toet