a-be aaaa aaab aaae aaap aaar aaba aabb aabp aabt aaea aaep aapa aapt aara aare aarp aart aaru aata aatt aaup abaa abab abae abap abar abat abau abb- abba abbb abbe abbr abbt abee aber abet abpa abpp abpr abra abta abtu abua abue abut aeap aeer aer- aera aeta aetr aett apap apar apat apba apbr apea apep aper apet apeu appa appr appt appu apra apre aprt apta apte aptt apua apup arab arae arap arar arat arau arba arbe area aree arep aret areu arpa arpe arpu arr- arra arre arrr arrt arru arta arte artr arua arub arue arup arut at-t ataa atab atae atap atar atat atea atee atep ater atpr atra atre atrp atru atta atte attp attr attu atua atub atur auaa aube auer aur- aura aure aut- aute baaa baar baat baba babb babe babr babu baer bapa bape bapp bapt bapu bar- bara barb bare barr bart baru bata bate batt batu bau- baur bbau bbbb bbeb bbet bbpr beap bear beat beau beba bebb bebe beeb beep beer beet bera bere berr bert beru beta bete bett betu beur bpea brab brae brat brau brea breb bree brep brer bret brrr brue brup brut btaa btbp btrt bttb buar buat buba bubb bube bubu buea buer bueu bupa bur- bura burb bure burp burr burt buru but- buta bute butt eaba eapp eara earb eare earp eart eata eate ebba ebbr eber ebru ebur eeea eeee eera eeta eete eetu epaa epee eper eppa eppp epra eprb eprp epta epte epub erap erat erau erba erbb erbe ereb erer eret erpa erpe erra erre erta ertu erua erub erur etap etat etbr etee eter etra etre etta ette ettu etua euba euer eur- eura eure eurt paap paar paat paba pabt pabu paea paep paer papa papb pape papp papr par- para pare parp parr part paru pata pate patr patt patu paua paup paur paut pbar pbpa peab peap pear peat peau peba peep peer peet pepa pepe per- pera pere perp perr pert peru peta pete petr pett peur peut ppap ppar pper pppa pppp ppru ppta pptt ppur prae prar prat prau pre- preb pree prep pret preu prtp prtr prue prut pruu ptab pter pu-e puar pube pubu puer puet pueu pupa pupe pupu pur- pura purb pure purp purr puru put- puta pute putt putu raab raat raba rabb rabe rabu raep raer rapa rape rapp rapt rara rarb rare rata rate ratp ratt ratu raua raub raue raup raut rbbb rbbr rea- reae reap rear reat reau reba rebb rebe rebu reeb reep reet repe repp repr rept repu rera rere rert reru reta rete retr rett reue reup reut reuu rpet rpta rrat rrrr rtee rtpa rttp ruba rubb rube rubp rubu ruer ruet rupa rupe rupp rupt rura rure rurp ruru ruta rute rutt rutu taa- taar taat taba tabb tabe tabu taer tapa tape tapp tapr tapt tapu tara tarb tare tarp tarr tart taru tata tatb tate tatr tatt tatu taua taub taue taur taut tbar tbrb tbta tbtp tear teat teba tebu teer teet tepa tepe tepp tepu ter- tera tere terp terr teru teta tete tetr tett tetu teut tpap tpau tper tppa tppp tppr tpte tptp tptr tput traa trab trae trap trat trau tre- trea tree tret treu trpa trpe trpp trra trte trtr trub true trut truu ttab ttbb tter tttt tuae tuar tuat tuba tubb tube tubr tubu tuer tuet tupa tupe tupu tura turb ture turp turr turt turu tuta tute tutt tutu u-rp uart uaru uata uatu uaua ubar ubba ubbe uber ubet ubra ueba upar upat upbe uppa uppe uppp uppu upra upup urap urat urau urba urbe ure- urea uret urra urre urte urup urur urut utau utep uter utpa uttu uuta uuuu