a-be a-ii aaaa aaab aaac aaad aaae aaai aaba aabb aabc aabd aabi aabt aaca aacb aacc aacd aace aaci aact aada aadc aade aadi aadt aaea aaec aaib aaic aaii aata aatc aatt abaa abab abac abad abae abai abat abb- abba abbb abbe abbi abbt abca abcb abcc abcd abci abct abda abdi abec abed abee abet abia abib abic abid abie abit abta ac-t acaa acab acac acad acae acai acat acba acca accc accd acce acci acct acda acdb acdc acde acdi acdt ace- acea acec aced acet aci- acia acic acid acie acta actc acte acti actt adaa adab adac adad adae adai adat adba adbc adbi adcc adci adda addc addd adde addi adea adeb adee adet adia adib adic adie adit adta aeac aebi aecb aeci aect aede aedt aeit aeta aetc aett aiai aiba aica aicc aicd aice aida aidb aidc aide aidi aidt aiea aiee aiet aiia aiib aiic aiid aita aite aiti aitt at-t ataa atab atac atad atae atai atat atca atcc atdi atdt atea atec ated atee atei atia atic atid atie atit atta atte atti ba-i baaa baad baat baba babb babe babi bac- baca bacc bace baci bact bada badb badd bade badi baed baia baib baic baid baie bait bata batc bate bati batt bbad bbbb bbci bbdd bbeb bbet bcaa bcat bcbc bcca bccc bcci bcda bcde bcec bcet bcia bcie bcit bctc bdbc bddc bdii bead beat beba bebb bebe bebi beca beci beda bede bedi beeb beed beet beia beic beit beta betc bete beti bett biad biat biba bibb bibe bibi bica bicc bice bici bida bide bidi bieb bied biet bita bitc bitd bite bitt btaa btcc btdt btec btie bttb c-cd caaa caab caac caat caba cabe cabi cac- caca cacc cace caci cada cadc cadd cade cadi caec caei caia caib caic caid cait cat- cata catb catc catd cate cati catt cbac cbat cbbc cbca cbcc cbce cbct cbdb cbdc cbdi cbea cbec cbee cbet cbia cbid cbit cbta cbtc ccaa ccab ccac ccad ccai ccat ccba ccbc ccca cccb cccc ccci ccdc ccdi cced ccee ccic ccid ccii cctb cctc cctt cd-e cdaa cdac cdad cdai cdba cdda cddb cdec cdic cdii ceac cead ceat ceba cec- ceca cece ceci cect ceda cedd cede cedi cedt ceeb ceec cet- ceta cete ceti ciaa ciat ciba cibc cibe cibi cica cicc cici cict cida cidc cide cidi cidt ciee ciia ciid ciii ciit cita citb cite citi citt ctab ctae ctba ctbi ctca ctec ctia ctic ctta daab daad daae daba dabb dabt daca dace daci dact dada dade dadi daeb daia daid daie dait data date dati datt dbcc dbit dbtt dcbc dcca dccb dccc dcci dcct dcdb dcia dcii dctc dddd ddie deac dead deae deba debe debi debt dec- deca decc decd dece deci dect deda dedd dede dedi deeb deed deet deid deie deit deta dete dia- diab diac diad diat diba dibb dibe dica dice dici dict dida dide didi diea dieb died diet diii dita dite diti ditt dtaa dtac dtcc dted eaba eaca eacc eada eadb eadd eadi eaec eata eate eati ebac ebba ebbc ebcc ebed ebic ebid ebit ecaa ecac ecad ecai ecat ecbc ecbe ecca eccb eccc ecce ecci ecct ecdc eced ecib ecit ect- ecta ectc edac edad edca edda eddc edde eddi ede- edea edei edia edie edit edta eeca eede eeea eeee eeta eetc eete eica eid- eide eidi eiec eied eiei eita eitb eitc eiti etai etat etbc etcc etec etee etic etta ette etti i-be iaaa iaac iaai iaat iaba iaca iacc iact iadb iadc iadt iaea iaec iaia iata iatc iate iati ibac ibad ibat ibca ibea ibec ibed ibet ibia ibid ibie ibtb ibtc icaa icab icac icad icai icat icbc icbd icca iccb iccc icci icct icdc icdd icde icea icec iced icee icet icta idad idae idat idbe idca idce idda idea idec ided idee idia idic idid idie idta ieac ieat iecc ieet ieie ieta iett iiac iica iicd iida iide iied iiie iiii iiit iita iitt itaa itac itai itat itbe itea itec itet itia itic itie itta taa- taat taba tabb tabc tabe tabi taca tacc tace taci tact tada tade taec taia tait tata tatb tate tati tatt tbca tbcb tbcc tbcd tbce tbit tbta tcad tcca tccc tcdd tctc tdac tddb teac tead teat teba teca tect teda tedd tede tedi teec teed teet teia teic teie teta tete teti tett tiaa tiab tiba tibi tica ticc tice tidc tidd tide tie- tiea tied tiee tiei tiet tiit tita titc tite titi titt ttab ttbb tttt