a-be aaaa aaab aaac aaad aaae aaar aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aacr aact aacu aada aadc aade aadt aadu aaea aaec aara aarc aard aare aart aaru aata aatc aatt abaa abab abac abad abae abar abat abau abb- abba abbb abbe abbr abbt abca abcb abcc abcd abcr abct abda abdu abec abed abee aber abet abra abrc abta abtu abua abud abue abut ac-t acaa acab acac acad acae acar acat acba acca accc accd acce acct accu acda acdb acdc acde acdt ace- acea acec aced acer acet acr- acra acrc acre acrr acta actc acte actt actu acu- acue acur acut adaa adab adac adad adae adar adat adba adbc adcc adda addc addd adde addr addu adea adeb adee ader adet adra adre adta adua adub adue adur aeac aecb aect aede aedt aeer aer- aera aerc aerd aeta aetc aetr aett arab arac arad arae arar arat arau arba arbe arc- arca arce arct arda ardc arde ardu area arec ared aree aret areu arr- arra arrc arre arrr arrt arru arta artc arte artr arua arub arud arue arut at-t ataa atab atac atad atae atar atat atca atcc atcr atdt atea atec ated atee ater atra atrc atre atru atta atte attr attu atua atub atuc atur auaa aube auca auce auct audc aude auer aur- aura aurd aure aut- aute baaa baad baar baat baba babb babe babr babu bac- baca bacc bace bact bada badb badd bade badr badu baed baer bar- bara barb barc bard bare barr bart baru bata batc bate batt batu bau- baud baur bbad bbau bbbb bbdd bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcda bcde bcec bcer bcet bcra bcru bctc bcuc bd-r bdbc bddc bead bear beat beau beba bebb bebe beca becu beda bede bedu beeb beed beer beet bera berc berd bere berr bert beru beta betc bete bett betu beur brab brac brad brae brat brau brca brcb brce brda brdt brea breb brec bred bree brer bret brrr brtc bruc brud brue brut btaa btcc btdt btec btrc btrt bttb buad buar buat buba bubb bube bubu buca bucc buce bucu buda budb budd bude budu buea buer bueu bur- bura burb burd bure burr burt buru but- buta bute butt c-cd caaa caab caac caat caba cabe cabu cac- caca cacc cace cacr cada cadc cadd cade cadr cadu caec caer caeu cara carb carc card care carr cart cat- cata catb catc catd cate catt catu cauc caut cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbcu cbdb cbdc cbea cbec cbee cber cbet cbrd cbre cbrt cbta cbtc ccaa ccab ccac ccad ccar ccat ccba ccbc ccca cccb cccc cccu ccdc ccdr cced ccee ccra ccrc ccre ccrt cctb cctc cctt ccuc ccut cd-e cd-r cdaa cdac cdad cdba cdda cddb cddr cdec cder cdre ceac cead cear ceat ceba cebu cec- ceca cece cect ceda cedd cede cedt cedu ceeb ceec cer- cera cerc cerd cere cert cet- ceta cete crab crac crar crat crau crbc crbu crca crcc crce crcr crda crdc cre- crea creb crec cred cree cret creu crrt crtc crub crud crue crut ctab ctae ctba ctca ctec ctrc ctta cuau cub- cuba cubb cube cuca cucc cuce cuda cude cued cuer cura curb curd cure curr curt cut- cuta cutc cute cutt daab daad daae daar daau daba dabb dabt dabu daca dace dact dada dade dadu daeb daer daeu dara darb darc dard dare darr dart daru data date datr datt datu daub daud daue daur daut dbar dbcc dbtt dcbc dcca dccb dccc dcct dccu dcdb dcra dctc dddd ddrc ddre ddub deac dead deae dear deau deba debe debt debu dec- deca decc decd dece dect deda dedd dede dedu deeb deed deer deet der- dera derb derc dere derr deta dete detr deua deue deur deut draa drab drac drad drar drat drau drba drbc drca drda drea dred dree dret drra drua drub drue drut druu dtaa dtac dtcc dted duaa duab duad duar duat dub- duba dubb dubc dube dubu duca duce duct duda dudd dude dudu duer duet dura dure durt duru duta dute duur duut eaba eaca eacc eada eadb eadd eaec eara earb eard eare eart eata eate ebac ebba ebbc ebbr ebcc ebed eber ebru ebur ecaa ecac ecad ecar ecat ecbc ecbe ecca eccb eccc ecce ecct ecdc eced ecra ecrc ecrr ecru ect- ecta ectc ecua edac edad edar edca edda eddc edde ede- edea eder edra edru edta educ edur eeca eede eedu eeea eeee eera eerc eeta eetc eete eetu erad erat erau erba erbb erbe erca ercc erce erda erde ereb erec ered erer eret erra errc erre erta ertu erua erub eruc erur etat etbc etbr etcc etec etee eter etra etre etta ette ettu etua euba eubc eucd eude euer eur- eura eurc eure eurt raab raad raat raba rabb rabe rabu rac- raca racc race ract racu rada radc radd rade radr radt radu raec raed raer rara rarb rare rata rate ratt ratu raua raub rauc raud raue raut rbbb rbbr rcac rcbc rccb rccc rcdc rcde rcet rcrd rctc rdac rder rea- reac read reae rear reat reau reba rebb rebe rebu reca recc recd rece recr rect recu reda redc redd rede redr redu reeb reed reet rera rerd rere rert reru reta retd rete retr rett reue reut reuu rrad rrat rred rrrr rtca rtcc rtce rtdt rtee ruad ruba rubb rube rubu ruca ruce ruct ruda rudd rude rued ruer ruet rura rurc rurd rure ruru ruta rute rutt rutu ruud taa- taar taat taba tabb tabc tabe tabu taca tacc tace tact tada tade taec taer tara tarb tarc tard tare tarr tart taru tata tatb tate tatr tatt tatu taua taub tauc taue taur taut tbar tbca tbcb tbcc tbcd tbce tbrb tbta tcad tcca tccc