a-be a-ii aaaa aaab aaac aaae aaai aaap aaar aaba aabb aabc aabi aabp aaca aacb aacc aace aaci aacp aacr aaea aaec aaep aaib aaic aaii aapa aapc aapi aara aarc aare aari aarp abaa abab abac abae abai abap abar abb- abba abbb abbe abbi abbr abca abcb abcc abci abcp abcr abec abee aber abia abib abic abie abir abpa abpc abpi abpp abpr abra abrc abri acaa acab acac acae acai acap acar acba acca accc acce acci accp ace- acea acec acer aci- acia acic acie acip acir acpa acpe acpi acpr acr- acra acrc acre acri acrr aeac aeap aebi aecb aeci aeer aer- aera aerc aeri aiai aiba aica aicc aice aicp aicr aiea aiee aiia aiib aiic aiir aipa aipe aipi aira aire airi airp apac apai apap apar apba apbr apca apcb apcc apcr apea apec apep aper api- apia apic apie apip appa appc appr apra aprc apre apri arab arac arae arai arap arar arba arbe arbi arc- arca arce arci area arec aree arei arep aria arib arie arii arip arpa arpe arpi arr- arra arrc arre arri arrr ba-i baaa baar baba babb babe babi babr bac- baca bacc bace baci baer baia baib baic baie bair bapa bapc bape bapi bapp bar- bara barb barc bare bari barr bbbb bbci bbeb bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bcci bcec bcer bcia bcie bcpp bcra beap bear beba bebb bebe bebi beca beci beeb beep beer beia beic beir bera berc bere beri berr biap biar biba bibb bibe bibi bica bicc bice bici bieb bier bipa bipp bira birb bire biri birr bpai bpcp bpea bprc brab brac brae brai brca brcb brce brea breb brec bree brei brep brer bria bric brie brrr caaa caab caac caap caba cabe cabi cac- caca cacc cace caci cacr caec caei caer caia caib caic caip cair capa capb capc cape capi capp cara carb carc care cari carp carr cbac cbar cbbc cbca cbcc cbce cbcp cbcr cbea cbec cbee cber cbia cbir cbpc cbpp cbre ccaa ccab ccac ccai ccap ccar ccba ccbc ccca cccb cccc ccci cccp ccee ccic ccii ccip ccir ccpa ccpe ccpp ccpr ccra ccrc ccre ccri ccrp ceac cear ceba cebp cec- ceca cece ceci cecp ceeb ceec ceip cepa cepc cepe cepp cepr cer- cera cerc cere ceri cerp ciaa ciar ciba cibc cibe cibi cica cicc cici cicr ciee cier ciia ciii cipa cipp cira cirb circ cire ciri cirr cpaa cpac cpap cpbc cpca cpce cpea cpeb cpep cper cpia cpic cppa cpre cpri crab crac crai crap crar crbc crca crcc crce crcr cre- crea creb crec cree crei crep cria crib cric crie crip crpc eaba eaca eacc eaec eapc eapp eara earb eare earp ebac ebba ebbc ebbr ebcc eber ebic ecaa ecac ecai ecar ecbc ecbe ecca eccb eccc ecce ecci ecib ecip ecpa ecpp ecra ecrc ecri ecrr eeca eeea eeee eera eerc eica eiec eiei eier eipr eira eire epaa epac epcc epci epec epee eper epi- epia epic epie epip eppa eppc eppp epra eprb eprp erap erba erbb erbe erca ercc erce ercp ereb erec erei erer eria eric erie erpa erpe erra errc erre i-be iaaa iaac iaai iaap iaba iaca iacc iacp iacr iaea iaec iaep iaia iapa iapp iara iarc iare ibac ibar ibca ibea ibec ibia ibie ibra ibrc ibri icaa icab icac icai icap icar icbc icbp icca iccb iccc icci iccp iccr icea icec icee icer icpa icpc icra icrc icre icrr ieac iecc ieie iepa iera iere ieri iiac iica iiie iiii iipa iira iirc ipac ipba ipca ipcc ipce ipea ipec iper ipie ippa ippc ippr ipri irac irae irai irap irar irbe irbp irca ircc iree irer iri- iria iric irie irip irpa irpc irpe irra irrc irre irri paap paar paba paca pace paci paea paec paep paer paia paib paie paip pair papa papb pape papi papp papr par- para parc pare pari parp parr pbac pbar pbcc pbpa pcaa pcae pcap pcba pcbc pcca pccc pcce pcea pcep pcer pcia pcip pcpb pcpp pcra pcrc pcre peab peac peai peap pear peba peca pece peci pecr peec peep peer peia peip peir pepa pepe pepi per- pera perc pere peri perp perr piai pibb pibi pica picc pice pici picr piea piep pier piia piip pipa pipe pipi pipp pira pirc pire piri pirr ppac ppap ppar ppcc ppci pper ppib ppic ppie pppa pppp pprc prae prai prar prbc prca prcc prcp pre- preb prec pree prep pri- pria prie prii prri raab raba rabb rabe rabi rac- raca racc race raci raec raep raer raia raic raie raii raip rair rapa rapc rape rapi rapp rara rarb rare rari rbbb rbbr rcac rcbc rccb rccc rcep rcic rcpi rea- reac reae reap rear reba rebb rebe reca recc rece reci recp recr reeb reep reia reii reir repe repi repp repr rera rere reri riaa riab riai rib- riba ribe rica ricc rice riep rier riia ripa ripe ripi ripp ripr rire riri rpca rpii rrrr