a-be aaaa aaab aaac aaad aaae aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aact aacu aada aadc aade aadt aadu aaea aaec aata aatc aatt abaa abab abac abad abae abat abau abb- abba abbb abbe abbt abca abcb abcc abcd abct abda abdu abec abed abee abet abta abtu abua abud abue abut ac-t acaa acab acac acad acae acat acba acca accc accd acce acct accu acda acdb acdc acde acdt ace- acea acec aced acet acta actc acte actt actu acu- acue acut adaa adab adac adad adae adat adba adbc adcc adda addc addd adde addu adea adeb adee adet adta adua adub adue 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 attu atua atub atuc auaa aube auca auce auct audc aude aut- aute baaa baad baat baba babb babe babu bac- baca bacc bace bact bada badb badd bade badu baed bata batc bate batt batu bau- baud bbad bbau bbbb bbdd bbeb bbet bcaa bcat bcbc bcca bccc bcda bcde bcec bcet bctc bcuc bdbc bddc bead beat beau beba bebb bebe beca becu beda bede bedu beeb beed beet beta betc bete bett betu btaa btcc btdt btec bttb buad buat buba bubb bube bubu buca bucc buce bucu buda budb budd bude budu buea bueu but- buta bute butt c-cd caaa caab caac caat caba cabe cabu cac- caca cacc cace cada cadc cadd cade cadu caec caeu cat- cata catb catc catd cate catt catu cauc caut cbac cbat cbbc cbca cbcc cbce cbct cbcu cbdb cbdc cbea cbec cbee cbet cbta cbtc ccaa ccab ccac ccad ccat ccba ccbc ccca cccb cccc cccu ccdc cced ccee cctb cctc cctt ccuc ccut cd-e cdaa cdac cdad cdba cdda cddb cdec ceac cead ceat ceba cebu cec- ceca cece cect ceda cedd cede cedt cedu ceeb ceec cet- ceta cete ctab ctae ctba ctca ctec ctta cuau cub- cuba cubb cube cuca cucc cuce cuda cude cued cut- cuta cutc cute cutt daab daad daae daau daba dabb dabt dabu daca dace dact dada dade dadu daeb daeu data date datt datu daub daud daue daut dbcc dbtt dcbc dcca dccb dccc dcct dccu dcdb dctc dddd ddub deac dead deae deau deba debe debt debu dec- deca decc decd dece dect deda dedd dede dedu deeb deed deet deta dete deua deue deut dtaa dtac dtcc dted duaa duab duad duat dub- duba dubb dubc dube dubu duca duce duct duda dudd dude dudu duet duta dute duut 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 ecua edac edad edca edda eddc edde ede- edea edta educ eeca eede eedu eeea eeee eeta eetc eete eetu etat etbc etcc etec etee etta ette ettu etua euba eubc eucd eude taa- taat taba tabb tabc tabe tabu taca tacc tace tact tada tade taec tata tatb tate tatt tatu taua taub tauc taue taut tbca tbcb tbcc tbcd tbce tbta tcad tcca tccc tccu tcdd tctc tdac tddb teac tead teat teba tebu teca tect teda tedd tede teec teed teet teta tete tett tetu teut ttab ttbb tttt tuae tuat tuba tubb tube tubu tuca tucc tude tudu tuet tuta tute tutt tutu uabc uaca uata uatu uaua ubac ubba ubbe ubet ubud ucad ucat ucbc ucca ucdc ucdd ucea ucua ucut udaa udad udau udbc udca udea udet ueba ueda utac utau utec uttu uuta uuuu