a-be aaaa aaab aaae aaap aaar aaav aaba aabb aabp aabt aaea aaep aaev aaoe aaoo aapa aapo aapt aara aare aaro aarp aart aata aatt aava abaa abab abae abap abar abat abb- abba abbb abbe abbo abbr abbt abee aber abet aboa abob aboo abor abot abov abpa abpp abpr abra abro abta abva abvp aeap aeer aer- aera aero aeta aeto aetr aett aeva aoba aopo aora aorb aort apao apap apar apat apba apbr apea apep aper apet apev apo- apoe apoo apop apor apot appa appr appt apra apre apro aprt apta apte aptt aptv arab arae arap arar arat arba arbe area aree areo arep aret arev aroa arob aroe aroo aror arpa arpe arr- arra arre arro arrr arrt arta arte arto artr artv arva arve arvo at-t ataa atab atae atap atar atat atea atee ateo atep ater atob atoe atop ator atot atpr atra atre atro atrp atta atte atto attp attr avab avao avar avat avea aveo aver avor avot avra avre avro avva avvo baaa baar baat baba babb babe babo babr baer bapa bape bapp bapt bar- bara barb bare baro barr bart bata bate bato batt bava bave bbbb bbeb bbet bbpr beap bear beat beav beba bebb bebe bebo beeb beep beer beet beo- beor beot bepo bera bere bero berr bert beta bete beto bett betv bevo boab boar boat boba bobb bobe bobo boea boee boeo boep boer boet boob booe boop boor boot bopa bope bopp bor- bora bore boro borr bort bota botb bote boto bott bova bove bovo bpea bpoe bpot brab brae brao brat brav brea breb bree breo brep brer bret brev broa brob broe broo bror brot brrr btaa btbp btob btor btrt bttb eaba eaop eapp eara earb eare earo earp eart eata eate eave eavp ebba ebbo ebbr eber eboe eboo ebor ebpo ebro eeea eeee eera eero eeta eete eeva eora eore eota eoto epaa epee eper epor epot eppa eppo eppp epra eprb epro eprp epta epte eptv erap erat erba erbb erbe ereb erer eret erev erob eroe eroo erpa erpe erra erre erro erta erve etap etat etbr etee eter etoe etra etre etro etta ette etto etvo evae evap evar evat evea ever evet evoe evoo evop evra evre o-eo oaer oara oare oate obba obbo obea ober obet oboe obor obot obra obre obro oepa oera oere oeta oevp ooaa ooba oobe ooer oooo oora oore oort ootb ootp opap opar opep oper opet opo- opor oppa oppo opra opto orab orae orao orar orat orav orba orbb orbe orbo ore- orea oreb oreo orer oro- oroe oror orot orpe orra orro orta orte orto orve orvr otap otar otea otee otep oter oto- otoe otoo otor otov otpp otra otre otro otta otte otto ovar ovee over ovet ovo- ovoo ovot ovpp ovra ovre paap paar paat paba pabt paea paep paer papa papb pape papp papr par- para pare paro parp parr part parv pata pate pato patr patt pava pave pavo pbar pbpa peab peap pear peat peba peep peer peet peev peor pepa pepe pepo per- pera pere pero perp perr pert perv peta pete peto petr pett poar poat poba pobo poea poer poet poop poor poot pop- popa pope popo popp popt pora porb pore poro porr port pota pote poto pott povo ppap ppar ppbv pper ppoa pppa pppo pppp ppta pptt pptv prae prao prar prat pre- preb pree prep pret prev pro- proa prob proe proo prop prot prov prtp prtr ptab pter ptop pvpa raab raat raba rabb rabe rabo raep raer raob raop rapa rape rapp rapt rara rarb rare raro rata rate rato ratp ratt rava rave rbbb rbbr rea- reae reao reap rear reat reba rebb rebe rebo reeb reep reet reev reop reot repe repo repp repr rept rera rere rero rert reta rete reto retr rett reva reve revo revp roab roap roar roat rob- roba robb robe robo robt roea roer roet roev roob roop roor root ropa rope ropo rora rore roro rort rota rote roto rotr rott rova rove rovo rpet rpob rpoe rpta rrat rrrr rtee rtpa rttp rtva rtve rver taa- taar taat taba tabb tabe tabo taer taoa taor tapa tape tapo tapp tapr tapt tara tarb tare taro tarp tarr tart tata tatb tate tato tatr tatt tatv tava tave tavo tbar tbrb tbta tbtp tear teat teba tebo teer teet teev teor tepa tepe tepp ter- tera tere tero terp terr teta tete teto tetr tett teva toab toat toba tobe tobo tobt toea toee toer toet tooa toor toot top- topa tope topo topp topt topv tora tore toro torp torr tort torv tota tote toto totr tott tova tove tovo tpap tper tppa tppp tppr tpte tptp tptr traa trab trae trao trap trat trav tre- trea tree treo tret trev troa troe troo trop trot trpa trpe trpp trpv trra trte trtr ttab ttbb tteo tter ttoe ttop tttt tver tvpa tvro tvrr tvtv vaar vaat vapa vapb vape vara vare varp varr vart vata vate vato vatt vava vear veat veba veep veer veet veor vepe vepr ver- vera verb vere vero vert veta vete veto vetr veve vevo voar voat voer voet voor voot vopt vor- vora vore voro vort vota vote voto votp vpat vpro vrap vrav vrba vreo vret vrot vrto vtap vtpr vver vvob vvpb vvvv