a-be a-ii aaaa aaab aaae aaaf aaai aaap aaar aaba aabb aabi aabp aaea aaep aafa aafb aaff aafi aaib aaii aapa aapi aara aare aari aarp abaa abab abae abaf abai abap abar abb- abba abbb abbe abbi abbr abee aber abff abia abib abie abir abpa abpi abpp abpr abra abri aeaf aeap aebi aeer aer- aera aeri afaa afap afar afee afer affa affi afia afib afif afir afpa afpe afr- afra afre afri aiai aiba aiea aiee aiff aiia aiib aiir aipa aipe aipf aipi aira aire airi airp apai apap apar apba apbr apea apep aper apfa api- apia apie apip appa appr apra apre apri arab arae araf arai arap arar arba arbe arbi area aree aref arei arep arfa arfb arff aria arib arie arif arii arip arpa arpe arpi arr- arra arre arri arrr ba-i baaa baaf baar baba babb babe babi babr baer baff baia baib baie bair bapa bape bapi bapp bar- bara barb bare barf bari barr bbbb bbeb bbpr beaf beap bear beba bebb bebe bebi beeb beef beep beer befa befe beff beia beir bera bere beri berr bfpp biaf biap biar biba bibb bibe bibi bieb bief bier bifa biff bifi bipa bipp bira birb bire biri birr bpai bpea brab brae braf brai brea breb bree bref brei brep brer bria brie brrr eaaf eaba eafb eaif eapp eara earb eare earp ebba ebbr eber eeea eeee eefa eefe eera efab efbr effa effi efpa eiei eier eipr eira eire epaa epee eper epfa epi- epia epie epip eppa eppp epra eprb eprp eraf erap erba erbb erbe ereb erei erer eria erie erpa erpe erra erre faaa faap faba fabe fabi faeb fafa fafe faff fafi faie fair fapa fape fapp fara farb fare farp farr fbar feaf feap fear feba feeb feer fefe feff fefi feia feie feir fepa fera ferb fere ferr ffar ffee ffff ffii ffrr fiaa fiaf fiap fiar fiba fibe fibp fief fier fifa fife fiff fifi fiii fipa fipp fira fire fpaa fpra fprf frab frae frap frea free frei frep fria frib frie frip i-be iaaa iaai iaap iaba iaea iaep iafe iaff iafp iaia iapa iapf iapp iara iare ibar ibea ibfi ibia ibie ibra ibri ieie iepa iera iere ieri ifaa ifae ifar ifbb ifer ifpa ifra ifrb ifrf ifri iifa iiie iiii iipa iipf iira ipaf ipba ipea iper ipie ippa ippf ippr ipri irae iraf irai irap irar irbe irbp iree irer irfe iri- iria irie irip irpa irpe irra irre irri paap paar paba paea paep paer pafa pafe paff paia paib paie paip pair papa papb pape papi papp papr par- para pare parf pari parp parr pbar pbpa pbrf peab peai peap pear peba peep peer peff peia peip peir pepa pepe pepi per- pera pere perf peri perp perr pfaa pfff pffr pfra piaf piai pibb pibi piea piep pier pifa piff piia piip pipa pipe pipi pipp pira pire piri pirr ppap ppar pper ppfa ppib ppie ppif pppa pppp pprf prae prai prar pre- preb pree pref prep pri- pria prie prif prii prri raab raaf raba rabb rabe rabi raef raep raer rafa rafe raff rafi raia raie raif raii raip rair rapa rape rapi rapp rara rarb rare rarf rari rbaf rbbb rbbr rea- reae reaf reap rear reba rebb rebe reeb reef reep refe reff refi refr reia reif reii reir repe repi repp repr rera rere reri rfae rfef riaa riab riai rib- riba ribe rief riep rier rifa rife riff riia riif ripa ripe ripi ripp ripr rire riri rpii rrif rrrr