a-be a-ii aaaa aaab aaac aaae aaai aaar aaba aabb aabc aabi aabt aaca aacb aacc aace aaci aacr aact aaea aaec aaib aaic aaii aara aarc aare aari aart aata aatc aatt abaa abab abac abae abai abar abat abb- abba abbb abbe abbi abbr abbt abca abcb abcc abci abcr abct abec abee aber abet abia abib abic abie abir abit abra abrc abri abta ac-t acaa acab acac acae acai acar acat acba acca accc acce acci acct ace- acea acec acer acet aci- acia acic acie acir acr- acra acrc acre acri acrr acta actc acte acti actt aeac aebi aecb aeci aect aeer aeit aer- aera aerc aeri aeta aetc aetr aett aiai aiba aica aicc aice aicr aiea aiee aiet aiia aiib aiic aiir aira aire airi airt aita aite aiti aitr aitt arab arac arae arai arar arat arba arbe arbi arc- arca arce arci arct area arec aree arei aret aria arib arie arii arit arr- arra arrc arre arri arrr arrt arta artc arte arti artr at-t ataa atab atac atae atai atar atat atca atcc atcr atea atec atee atei ater atia atic atie atit atra atrc atre atri atta atte atti attr ba-i baaa baar baat baba babb babe babi babr bac- baca bacc bace baci bact baer baia baib baic baie bair bait bar- bara barb barc bare bari barr bart bata batc bate bati batt bbbb bbci bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcci bcec bcer bcet bcia bcie bcit bcra bctc bear beat beba bebb bebe bebi beca beci beeb beer beet beia beic beir beit bera berc bere beri berr bert beta betc bete beti bett biar biat biba bibb bibe bibi bica bicc bice bici bieb bier biet bira birb bire biri birr birt bita bitc bite bitt brab brac brae brai brat brca brcb brce brea breb brec bree brei brer bret bria bric brie brit brrr brtc btaa btcc btec btie btrc btrt bttb caaa caab caac caat caba cabe cabi cac- caca cacc cace caci cacr caec caei caer caia caib caic cair cait cara carb carc care cari carr cart cat- cata catb catc cate cati catt cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbea cbec cbee cber cbet cbia cbir cbit cbre cbrt cbta cbtc ccaa ccab ccac ccai ccar ccat ccba ccbc ccca cccb cccc ccci ccee ccic ccii ccir ccra ccrc ccre ccri ccrt cctb cctc cctt ceac cear ceat ceba cec- ceca cece ceci cect ceeb ceec cer- cera cerc cere ceri cert cet- ceta cete ceti ciaa ciar ciat ciba cibc cibe cibi cica cicc cici cicr cict ciee cier ciia ciii ciit cira cirb circ cire ciri cirr cirt cita citb cite citi citt crab crac crai crar crat crbc crca crcc crce crcr cre- crea creb crec cree crei cret cria crib cric crie crit crrt crtc ctab ctae ctba ctbi ctca ctec ctia ctic ctrc ctta eaba eaca eacc eaec eara earb eare eart eata eate eati ebac ebba ebbc ebbr ebcc eber ebic ebit ecaa ecac ecai ecar ecat ecbc ecbe ecca eccb eccc ecce ecci ecct ecib ecit ecra ecrc ecri ecrr ect- ecta ectc eeca eeea eeee eera eerc eeta eetc eete eica eiec eiei eier eira eire eita eitb eitc eiti eitr erat erba erbb erbe erca ercc erce ereb erec erei erer eret eria eric erie erit erra errc erre erta etai etat etbc etbr etcc etec etee eter etic etra etre etta ette etti i-be iaaa iaac iaai iaat iaba iaca iacc iacr iact iaea iaec iaia iara iarc iare iart iata iatc iate iati ibac ibar ibat ibca ibea ibec ibet ibia ibie ibra ibrc ibri ibtb ibtc icaa icab icac icai icar icat icbc icca iccb iccc icci iccr icct icea icec icee icer icet icra icrc icre icrr icrt icta ieac ieat iecc ieet ieie iera iere ieri ieta iett iiac iica iiie iiii iiit iira iirc iita iitr iitt irac irae irai irar irbe irca ircc iree irer iri- iria iric irie irra irrc irre irri irta irte irti itaa itac itai itar itat itbe itea itec iter itet itia itic itie itra itri itta raab raat raba rabb rabe rabi rac- raca racc race raci ract raec raer raia raic raie raii rair rait rara rarb rare rari rata rate rati ratt rbbb rbbr rcac rcbc rccb rccc rcet rcic rctc rcti rea- reac reae rear reat reba rebb rebe reca recc rece reci recr rect reeb reet reia reii reir reit rera rere reri rert reta rete reti retr rett riaa riab riai riat rib- riba ribe rica ricc rice rict rier riet riia rire riri rita rite riti ritt rrat rrrr rtai rtca rtcc rtce rtee rtei taa- taar taat taba tabb tabc tabe tabi taca tacc tace taci tact taec taer taia tair tait tara tarb tarc tare tari tarr tart tata tatb tate tati tatr tatt tbar tbca tbcb tbcc tbce tbit tbrb tbta tcca tccc tctc teac tear teat teba teca tecr tect teec teer teet teia teic teie teir ter- tera terc tere teri terr teta tete teti tetr tett tiaa tiab tiar tiba tibi tica ticc tice tie- tiea tiee tiei tier tiet tiit tira tirb tire tiri tirr tita titc tite titi titt traa trab trac trae trai trat trca trcc tre- trea trec tree trei tret tri- tria trib tric trie trit trra trtc trte trtr ttab ttbb tter tttt