a-be a-ii aaaa aaab aaac aaae aaaf aaai aaba aabb aabc aabi aabt aaca aacb aacc aace aacf aaci aact aaea aaec aafa aafb aafc aaff aafi aaib aaic aaii aata aatc aatf aatt abaa abab abac abae abaf abai abat abb- abba abbb abbe abbi abbt abca abcb abcc abcf abci abct abec abee abet abff abia abib abic abie abit abta ac-t acaa acab acac acae acai acat acba acca accc acce accf acci acct ace- acea acec acet acfc acfe acfi acft aci- acia acic acie acif acta actc acte actf acti actt aeac aeaf aebi aecb aeci aect aeit aeta aetc aetf aett afaa afat afca afcb afcc afci afee afet affa affc affi afft afia afib afif afit afta aftc afte aiai aiba aica aicc aice aicf aiea aiee aiet aiff aiia aiib aiic aita aite aitf aiti aitt at-t ataa atab atac atae atai atat atca atcc atcf atea atec atee atef atei atfb atfc atfe atia atic atie atif atit atta atte atti ba-i baaa baaf baat baba babb babe babi bac- baca bacc bace baci bact bafc baff baft baia baib baic baie bait bata batc bate batf bati batt bbbb bbci bbeb bbet bbfc bcaa bcat bcbc bcca bccc bcci bcec bcet bcfc bcia bcie bcit bctc beaf beat beba bebb bebe bebi beca beci beeb beef beet befa befe beff beft beia beic beit beta betc bete beti bett bfca bfta bftt biaf biat biba bibb bibe bibi bica bicc bice bici bieb bief biet bifa biff bifi bita bitc bite bitt btaa btaf btcc btec btfc btie bttb caaa caab caac caaf caat caba cabe cabf cabi cac- caca cacc cace caci caec caei cafa cafb cafc cafe caff caia caib caic cait cat- cata catb catc cate catf cati catt cbac cbat cbbc cbca cbcc cbce cbct cbea cbec cbee cbef cbet cbfb cbfc cbia cbit cbta cbtc cbtf ccaa ccab ccac ccaf ccai ccat ccba ccbc ccca cccb cccc cccf ccci ccee ccfa ccfc ccff ccfi ccic ccii cctb cctc cctt ceac ceat ceba cec- ceca cece ceci cect ceeb ceec cef- cefa cefc cet- ceta cete ceti cfaa cfab cfac cfae cfbc cfbt cfca cfcb cfcf cffb cfia cfit cfta cftc cfte ciaa ciat ciba cibc cibe cibi cica cicc cici cict ciee cifa cife ciff ciia ciii ciit cita citb cite citf citi citt ctab ctae ctba ctbi ctca ctcf ctec ctfc ctia ctic ctta eaaf eaba eaca eacc eaec eafb eaif eata eate eati ebac ebba ebbc ebcc ebfc ebic ebit ecaa ecac ecai ecat ecbc ecbe ecca eccb eccc ecce ecci ecct ecef ecfa ecfc ecib ecit ect- ecta ectc ectf eeca eeea eeee eefa eefe eeta eetc eete efab efca efet effa effi efic efit eft- efta eica eiec eiei eita eitb eitc eiti etai etat etbc etcc etec etee etfa etfb etfc etfe etic etta ette etti faaa faac faba fabe fabi faca facc face fact faeb fafa fafc fafe faff fafi faie fait fata fatc fate fatf fati fatt fcab fcat fcba fcca fccf fcic fcii feaf feat feba fece fect feeb feet fefc fefe feff fefi feia feie feit feta fete feti fett ffcc ffee ffff ffii fftf fiaa fiac fiaf fiat fiba fibe fica ficc fice fict fiec fief fifa fifc fife fiff fifi fift fiii fita fitc fite fiti fitt ft-c ftea ftfc ftii i-be iaaa iaac iaai iaat iaba iaca iacc iact iaea iaec iafc iafe iaff iaia iata iatc iate iati ibac ibat ibca ibea ibec ibet ibfi ibia ibie ibtb ibtc icaa icab icac icaf icai icat icbc icca iccb iccc iccf icci icct icea icec icee icef icet icfb icta ieac ieat iecc ieet ieie ieta ietf iett ifaa ifac ifae ifat ifbb ific ifit ifta iiac iica iifa iiie iiii iiit iita iitt itaa itac itaf itai itat itbe itea itec itet itfa itia itic itie itif itta ittf taa- taaf taat taba tabb tabc tabe tabi taca tacc tace taci tact taec tafa tafc tafe taff tafi taft taia tait tata tatb tate tati tatt tbaf tbca tbcb tbcc tbce tbit tbta tcca tccc tcfc tctc teac teat teba teca tect teec teef teet tefc teff tefi teft teia teic teie teta tete teti tett tfae tfca tfeb tfec tftc tiaa tiab tiaf tiba tibi tica ticc tice tie- tiea tiee tief tiei tiet tifa tiff tift tiit tita titc tite titi titt ttab ttbb ttfa ttfc ttff tttt