a-be a-ii aaaa aaab aaae aaai aaap aaar aaba aabb aabi aabp aabt aaea aaep aaib aaii aapa aapi aapt aara aare aari aarp aart aata aatt abaa abab abae abai abap abar abat abb- abba abbb abbe abbi abbr abbt abee aber abet abia abib abie abir abit abpa abpi abpp abpr abra abri abta aeap aebi aeer aeit aer- aera aeri aeta aetr aett aiai aiba aiea aiee aiet aiia aiib aiir aipa aipe aipi aira aire airi airp airt aita aite aiti aitr aitt apai apap apar apat apba apbr apea apep aper apet api- apia apie apip apit appa appr appt apra apre apri aprt apta apte apti aptt arab arae arai arap arar arat arba arbe arbi area aree arei arep aret aria arib arie arii arip arit arpa arpe arpi arr- arra arre arri arrr arrt arta arte arti artr at-t ataa atab atae atai atap atar atat atea atee atei atep ater atia atie atip atit atpr atra atre atri atrp atta atte atti attp attr ba-i baaa baar baat baba babb babe babi babr baer baia baib baie bair bait bapa bape bapi bapp bapt bar- bara barb bare bari barr bart bata bate bati batt bbbb bbeb bbet bbpr beap bear beat beba bebb bebe bebi beeb beep beer beet beia beir beit bera bere beri berr bert beta bete beti bett biap biar biat biba bibb bibe bibi bieb bier biet bipa bipp bira birb bire biri birr birt bita bite bitt bpai bpea bpti brab brae brai brat brea breb bree brei brep brer bret bria brie brit brrr btaa btbp btie btrt bttb eaba eapp eara earb eare earp eart eata eate eati ebba ebbr eber ebit eeea eeee eera eeta eete eiei eier eipr eira eire eita eitb eiti eitr epaa epee eper epi- epia epie epip epit eppa eppp epra eprb eprp epta epte erap erat erba erbb erbe ereb erei erer eret eria erie erit erpa erpe erra erre erta etai etap etat etbr etee eter etra etre etta ette etti i-be iaaa iaai iaap iaat iaba iaea iaep iaia iapa iapp iapt iara iare iart iata iate iati ibar ibat ibea ibet ibia ibie ibra ibri ibtb ieat ieet ieie iepa iera iere ieri ieta iett iiie iiii iiit iipa iira iita iitr iitt ipat ipba ipea iper ipet ipie ippa ippr ipri ipta irae irai irap irar irbe irbp iree irer iri- iria irie irip irpa irpe irra irre irri irta irte irti irtp itaa itai itap itar itat itbe itea itep iter itet itia itie itpa itra itri itta paap paar paat paba pabt paea paep paer paia paib paie paip pair pait papa papb pape papi papp papr par- para pare pari parp parr part pata pate pati patr patt pbar pbpa peab peai peap pear peat peba peep peer peet peia peip peir peit pepa pepe pepi per- pera pere peri perp perr pert peta pete peti petr pett piai piat pibb pibi piea piep pier piet piia piip pipa pipe pipi pipp pira pire piri pirr pita pite piti pitr pitt ppap ppar pper ppib ppie pppa pppp ppta pptt prae prai prar prat pre- preb pree prep pret pri- pria prie prii prri prti prtp prtr ptab pter raab raat raba rabb rabe rabi raep raer raia raie raii raip rair rait rapa rape rapi rapp rapt rara rarb rare rari rata rate rati ratp ratt rbbb rbbr rea- reae reap rear reat reba rebb rebe reeb reep reet reia reii reir reit repe repi repp repr rept rera rere reri rert reta rete reti retr rett riaa riab riai riat rib- riba ribe riep rier riet riia ripa ripe ripi ripp ripr ript rire riri rita rite riti ritt rpet rpii rpta rrat rrrr rtai rtee rtei rtpa rttp taa- taar taat taba tabb tabe tabi taer taia taip tair tait tapa tape tapi tapp tapr tapt tara tarb tare tari tarp tarr tart tata tatb tate tati tatr tatt tbar tbit tbrb tbta tbtp tear teat teba teer teet teia teie teip teir tepa tepe tepi tepp ter- tera tere teri terp terr teta tete teti tetr tett tiaa tiab tiar tiba tibi tie- tiea tiee tiei tiep tier tiet tiit tip- tipa tipe tipi tipp tipt tira tirb tire tiri tirr tita tite titi titp titt tpap tper tpia tpir tppa tppp tppr tpte tptp tptr traa trab trae trai trap trat tre- trea tree trei tret tri- tria trib trie trip trit trpa trpe trpp trra trte trtr ttab ttbb tter tttt