a-be a-ii aaaa aaab aaae aaai aaap aaar aaba aabb aabi aabp aaea aaep aaib aaii aapa aapi aara aare aari aarp abaa abab abae abai abap abar abb- abba abbb abbe abbi abbr abee aber abia abib abie abir abpa abpi abpp abpr abra abri aeap aebi aeer aer- aera aeri aiai aiba aiea aiee aiia aiib aiir aipa aipe aipi aira aire airi airp apai apap apar apba apbr apea apep aper api- apia apie apip appa appr apra apre apri arab arae arai arap arar arba arbe arbi area aree arei arep aria arib arie arii arip arpa arpe arpi arr- arra arre arri arrr ba-i baaa baar baba babb babe babi babr baer baia baib baie bair bapa bape bapi bapp bar- bara barb bare bari barr bbbb bbeb bbpr beap bear beba bebb bebe bebi beeb beep beer beia beir bera bere beri berr biap biar biba bibb bibe bibi bieb bier bipa bipp bira birb bire biri birr bpai bpea brab brae brai brea breb bree brei brep brer bria brie brrr eaba eapp eara earb eare earp ebba ebbr eber eeea eeee eera eiei eier eipr eira eire epaa epee eper epi- epia epie epip eppa eppp epra eprb eprp erap erba erbb erbe ereb erei erer eria erie erpa erpe erra erre i-be iaaa iaai iaap iaba iaea iaep iaia iapa iapp iara iare ibar ibea ibia ibie ibra ibri ieie iepa iera iere ieri iiie iiii iipa iira ipba ipea iper ipie ippa ippr ipri irae irai irap irar irbe irbp iree irer iri- iria irie irip irpa irpe irra irre irri paap paar paba paea paep paer paia paib paie paip pair papa papb pape papi papp papr par- para pare pari parp parr pbar pbpa peab peai peap pear peba peep peer peia peip peir pepa pepe pepi per- pera pere peri perp perr piai pibb pibi piea piep pier piia piip pipa pipe pipi pipp pira pire piri pirr ppap ppar pper ppib ppie pppa pppp prae prai prar pre- preb pree prep pri- pria prie prii prri raab raba rabb rabe rabi raep raer raia raie raii raip rair rapa rape rapi rapp rara rarb rare rari rbbb rbbr rea- reae reap rear reba rebb rebe reeb reep reia reii reir repe repi repp repr rera rere reri riaa riab riai rib- riba ribe riep rier riia ripa ripe ripi ripp ripr rire riri rpii rrrr