a-be aaaa aaab aaae aaap aaar aaba aabb aabp aabt aaea aaep aaoe aaoo aapa aapo aapt aara aare aaro aarp aart aata aatt abaa abab abae abap abar abat abax abb- abba abbb abbe abbo abbr abbt abee aber abet aboa abob aboo abor abot abox abpa abpp abpr abra abro abta aeap aeer aer- aera aero aeta aeto aetr aett aetx aoba aopo aora aorb aort apao apap apar apat apax apba apbr apea apep aper apet apex apo- apoe apoo apop apor apot apox appa appr appt appx apra apre apro aprt apta apte aptt aptx arab arae arap arar arat arax arba arbe area aree areo arep aret arex aroa arob aroe aroo aror arpa arpe arr- arra arre arro arrr arrt arta arte arto artr artx at-t at-x ataa atab atae atap atar atat atax atea atee ateo atep ater atex atob atoe atop ator atot atpr atra atre atro atrp atrx atta atte atto attp attr axar axat axer axo- axoa axto axxo ba-x baaa baar baat baba babb babe babo babr baer bapa bape bapp bapt bar- bara barb bare baro barr bart barx bata bate bato batt baxt bbbb bbeb bbet bbox bbpr beap bear beat beba bebb bebe bebo beeb beep beer beet beo- beor beot bepo bera bere bero berr bert beta bete beto bett boab boar boat boba bobb bobe bobo boea boee boeo boep boer boet boob booe boop boor boot boox bopa bope bopp bor- bora bore boro borr bort bota botb bote boto bott boxa bpea bpoe bpot brab brae brao brat brax brea breb bree breo brep brer bret brex broa brob broe broo bror brot brox brrr btaa btbp btex btob btor btrt bttb eaba eaop eapp eara earb eare earo earp eart eata eate ebba ebbo ebbr eber eboe eboo ebor ebox ebpo ebro eeea eeee eera eero eeta eete eext eora eore eota eoto epaa epee eper epor epot epox eppa eppo eppp epra eprb epro eprp epta epte epxp er-x erap erat erba erbb erbe ereb erer eret erob eroe eroo erpa erpe erra erre erro erta etap etat etbr etee eter etoe etox etra etre etro etta ette etto exa- exer exo- exor expo expr expt exrx exta exte extr o-eo oaer oara oare oate obba obbo obea ober obet obex oboe obor obot obox obra obre obro oeax oepa oera oere oeta ooaa ooba oobe ooer oooo oora oore oort ootb ootp opap opar opep oper opet opex opo- opor oppa oppo opra opto orab orae orao orar orat orba orbb orbe orbo ore- orea oreb oreo orer orex oro- oroe oror orot orpe orra orro orta orte orto otap otar otea otee otep oter oto- otoe otoo otor otpp otra otre otro otta otte otto oxa- oxea oxep oxer oxo- oxox oxxo paap paar paat paba pabt pabx paea paep paer paox papa papb pape papp papr par- para pare paro parp parr part pata pate pato patr patt paxo pbar pbpa peab peap pear peat peax peba peep peer peet peor pepa pepe pepo per- pera pere pero perp perr pert 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 ppap ppar pper ppoa pppa pppo pppp ppta pptt prae prao prar prat pre- preb pree prep pret prex pro- proa prob proe proo prop prot prox prtp prtr ptab pter ptop ptox raab raat raba rabb rabe rabo raep raer raob raop rapa rape rapp rapt rara rarb rare raro rata rate rato ratp ratt raxa rbbb rbbr rea- reae reao reap rear reat reba rebb rebe rebo reeb reep reet reop reot repe repo repp repr rept rera rere rero rert reta rete reto retr rett rexx roab roap roar roat rob- roba robb robe robo robt roea roer roet roob roop roor root roox ropa rope ropo rora rore roro rort rota rote roto rotr rott roxa roxo rpet rpob rpoe rpta rrat rrrr rtee rtex rtpa rttp 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 tax- taxa taxe taxo taxt tbar tbox tbrb tbta tbtp tear teat teba tebo teer teet teor tepa tepe tepp ter- tera tere tero terp terr teta tete teto tetr tett tetx texa text toab toat toba tobe tobo tobt toea toee toer toet tooa toor toot top- topa tope topo topp topt tora tore toro torp torr tort torx tota tote toto totr tott tox- toxa toxo toxt tpap tper tppa tppp tppr tpte tptp tptr traa trab trae trao trap trat trax tre- trea tree treo tret trex troa troe troo trop trot trox trpa trpe trpp trra trte trtr ttab ttbb tteo tter ttoe ttop tttt txaa txtr xaar xapo xara xare xate xbar xbee xbox xbra xeer xer- xera xero xert xexe xoro xorp xote xoxo xpax xper xpot xpra xpto xrep xtar xtea xtep xtra xtro xxxo xxxx