a-be a-ii aaaa aaab aaae aaai aaap aaar aaba aabb aabi aabp aaea aaep aaib aaii aaoe aaoo aapa aapi aapo aara aare aari aaro aarp abaa abab abae abai abap abar abb- abba abbb abbe abbi abbo abbr abee aber abia abib abie abir aboa abob aboo abor abpa abpi abpp abpr abra abri abro aeap aebi aeer aeio aer- aera aeri aero aiai aiba aibo aiea aiee aiia aiib aiir aioi aipa aipe aipi aira aire airi airo airp aoba aopo aora aorb apai apao apap apar apba apbr apea apep aper api- apia apie apio apip apo- apoe apoo apop apor appa appr apra apre apri apro arab arae arai arap arar arba arbe arbi area aree arei areo arep aria arib arie arii ario arip aroa arob aroe aroi aroo aror arpa arpe arpi arr- arra arre arri arro arrr ba-i baaa baar baba babb babe babi babo babr baer baia baib baie baio bair bapa bape bapi bapp bar- bara barb bare bari baro barr bbbb bbeb bbpr beap bear beba bebb bebe bebi bebo beeb beep beer beia beir beo- beor bepo bera bere beri bero berr biao biap biar biba bibb bibe bibi bibo bieb bier bio- bioi bipa bipp bira birb bire biri biro birr boab boai boar boba bobb bobe bobi bobo boea boee boeo boep boer boi- boie boii boob booe boop boor bopa bope bopp bor- bora bore bori boro borr bpai bpea bpoe brab brae brai brao brea breb bree brei breo brep brer bria brie brio broa brob broe broo bror brrr eaba eaop eapp eara earb eare earo earp ebba ebbo ebbr eber eboe eboo ebor ebpo ebro eeea eeee eera eero eiao eiei eier eipo eipr eira eire eoir eora eore eori epaa epee eper epi- epia epie epip epor eppa eppo eppp epra eprb epro eprp erap erba erbb erbe ereb erei erer eria erie erio erob eroe eroi eroo erpa erpe erra erre erro i-be iaaa iaai iaap iaba iaea iaep iaia iapa iapp iara iare ibar ibea ibia ibie ibra ibri ibro ieie ieio iepa iera iere ieri iiie iiii iiio iioi iioo iiop iipa iira ioba iobi ioee ioii ioio iooi iooo iora iore iori ipba ipea iper ipie ipoe ipop ippa ippo ippr ipri irae irai irao irap irar irbe irbp iree irer iri- iria irie irio irip irob irop irpa irpe irra irre irri o-eo oaer oapi oara oare obai obba obbo obea ober obia obie oboe oboi obor obra obre obri obro oepa oera oere oiba oier oiii oira oire ooaa ooba oobe oobi ooer ooia oooo oora oore opap opar opei opep oper opia opie opii opio opo- opor oppa oppi oppo opra orab orae orai orao orar orba orbb orbe orbi orbo ore- orea oreb oreo orer ori- oria orie orio oro- oroe oror orpe orpi orra orri orro paap paar paba paea paep paer paia paib paie paio paip pair papa papb pape papi papp papr par- para pare pari paro parp parr pbar pbpa peab peai peap pear peba peep peer peia peio peip peir peor pepa pepe pepi pepo per- pera pere peri pero perp perr piai piao pibb pibi piea piep pier piia piip piob pipa pipe pipi pipo pipp pira pire piri piro pirr poar poba pobo poea poer poia poio poop poor pop- popa pope popi popo popp pora porb pore pori poro porr ppap ppar pper ppib ppie ppoa pppa pppo pppp prae prai prao prar pre- preb pree prep pri- pria prie prii pro- proa prob proe proo prop prri raab raba rabb rabe rabi rabo raep raer raia raie raii raip rair raob raop rapa rape rapi rapp rara rarb rare rari raro rbbb rbbr rea- reae reao reap rear reba rebb rebe rebo reeb reep reia reii reir reop repe repi repo repp repr rera rere reri rero riaa riab riai rib- riba ribe ribo riep rier riia ripa ripe ripi ripp ripr rire riri roab roap roar rob- roba robb robe robi robo roea roer roia roio roir roob rooi roop roor ropa rope ropo rora rore rori roro rpii rpob rpoe rrrr