a-be aaaa aaab aaad aaae aaap aaar aaba aabb aabd aabp aabt aada aade aadt aaea aaep aapa aapt aara aard aare aarp aart aata aatt abaa abab abad abae abap abar abat abb- abba abbb abbe abbr abbt abda abed abee aber abet abpa abpd abpp abpr abra abta adaa adab adad adae adap adar adat adba adda addd adde addr adea adeb adee ader adet adp- adra adre adta aeap aede aedt aeer aer- aera aerd aeta aetr aett apap apar apat apba apbr apda apdd apea aped apep aper apet appa appd appr appt apra apre aprt apta apte aptt arab arad arae arap arar arat arba arbe arda arde area ared aree arep aret arpa arpe arr- arra arre arrr arrt arta arte artr at-t ataa atab atad atae atap atar atat atdt atea ated atee atep ater atpr atra atre atrp atta atte attp attr baaa baad baar baat baba babb babe babr bada badb badd bade badr baed baer bapa bape bapp bapt bar- bara barb bard bare barr bart bata bate batt bbad bbbb bbdd bbeb bbet bbpr bd-r bead beap bear beat beba bebb bebe beda bede beeb beed beep beer beet bera berd bere berr bert beta bete bett bpda bpea bprd brab brad brae brat brda brdt brea breb bred bree brep brer bret brrr btaa btbp btdt btrt bttb daab daad daae daap daar daba dabb dabp dabt dada dade daeb daer dapa dape dapp dara darb dard dare darp darr dart data date datp datr datt dbar dbpd dbtt dddd ddre dead deae deap dear deba debe debt deda dedd dede deeb deed deep deer deet depa depe depp depr dept der- dera derb dere derp derr deta dete detr dpaa dpdt dper dppa draa drab drad drap drar drat drba drda drea dred dree dret drra dtaa dtap dtdp dted dttp eaba eada eadb eadd eadp eapp eara earb eard eare earp eart eata eate ebba ebbr ebed eber edad edar edda edde eddp ede- edea eder edra edta eede eeea eeee eera eeta eete epaa epad epee eper eppa eppp epra eprb eprp epta epte erad erap erat erba erbb erbe erda erde ereb ered erer eret erpa erpe erra erre erta etap etat etbr etee eter etra etre etta ette paap paar paat paba pabt pada padd pade paea paep paer papa papb pape papp papr par- para pard pare parp parr part pata patd pate patr patt pbar pbed pbpa pdea pdpa pdpr peab peap pear peat peba ped- peda pede peed peep peer peet pepa pepd pepe per- pera perd pere perp perr pert peta pete petr pett ppad ppap ppar pper pppa pppd pppp ppta pptt prad prae prar prat pre- preb pred pree prep pret prpd prrd prtp prtr ptab pter ptpd ptrd raab raad raat raba rabb rabe rada radd rade radr radt raed raep raer rapa rapd rape rapp rapt rara rarb rare rata rate ratp ratt rbbb rbbr rdap rdbp rder rea- read reae reap rear reat reba rebb rebe reda redd rede redr reeb reed reep reet repe repp repr rept rera rerd rere rert reta retd rete retr rett rpdp rpet rpta rptd rrad rrat rred rrrr rtdt rtee rtpa rttp taa- taar taat taba tabb tabe tada tade taer tapa tape tapp tapr tapt tara tarb tard tare tarp tarr tart tata tatb tate tatr tatt tbar tbrb tbta tbtp tdap tddb tdra tead tear teat teba teda tedd tede teed teer teet tepa tepe tepp ter- tera tere terp terr teta tete tetr tett tpap tped tper tppa tppd tppp tppr tpte tptp tptr traa trab trad trae trap trat tre- trea tred tree tret trpa trpe trpp trra trte trtr ttab ttbb tter tttt