a-be aaaa aaab aaac aaad aaae aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aact aada aadc aade aadt aaea aaec aata aatc aatt abaa abab abac abad abae abat abb- abba abbb abbe abbt abca abcb abcc abcd abct abda abec abed abee abet abta ac-t acaa acab acac acad acae acat acba acca accc accd acce acct acda acdb acdc acde acdt ace- acea acec aced acet acta actc acte actt adaa adab adac adad adae adat adba adbc adcc adda addc addd adde adea adeb adee adet adta aeac aecb aect aede aedt aeta aetc aett at-t ataa atab atac atad atae atat atca atcc atdt atea atec ated atee atta atte baaa baad baat baba babb babe bac- baca bacc bace bact bada badb badd bade baed bata batc bate batt bbad bbbb bbdd bbeb bbet bcaa bcat bcbc bcca bccc bcda bcde bcec bcet bctc bdbc bddc bead beat beba bebb bebe beca beda bede beeb beed beet beta betc bete bett btaa btcc btdt btec bttb c-cd caaa caab caac caat caba cabe cac- caca cacc cace cada cadc cadd cade caec cat- cata catb catc catd cate catt cbac cbat cbbc cbca cbcc cbce cbct cbdb cbdc cbea cbec cbee cbet cbta cbtc ccaa ccab ccac ccad ccat ccba ccbc ccca cccb cccc ccdc cced ccee cctb cctc cctt cd-e cdaa cdac cdad cdba cdda cddb cdec ceac cead ceat ceba cec- ceca cece cect ceda cedd cede cedt ceeb ceec cet- ceta cete ctab ctae ctba ctca ctec ctta daab daad daae daba dabb dabt daca dace dact dada dade daeb data date datt dbcc dbtt dcbc dcca dccb dccc dcct dcdb dctc dddd deac dead deae deba debe debt dec- deca decc decd dece dect deda dedd dede deeb deed deet deta dete dtaa dtac dtcc dted eaba eaca eacc eada eadb eadd eaec eata eate ebac ebba ebbc ebcc ebed ecaa ecac ecad ecat ecbc ecbe ecca eccb eccc ecce ecct ecdc eced ect- ecta ectc edac edad edca edda eddc edde ede- edea edta eeca eede eeea eeee eeta eetc eete etat etbc etcc etec etee etta ette taa- taat taba tabb tabc tabe taca tacc tace tact tada tade taec tata tatb tate tatt tbca tbcb tbcc tbcd tbce tbta tcad tcca tccc tcdd tctc tdac tddb teac tead teat teba teca tect teda tedd tede teec teed teet teta tete tett ttab ttbb tttt