a-be a-do aaaa aaab aaac aaad aaae aaar aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aaco aacr aact aada aadc aade aadt aaea aaec aaoe aaoo aara aarc aard aare aaro aart aata aatc aatt abaa abab abac abad abae abar abat abb- abba abbb abbe abbo abbr abbt abca abcb abcc abcd abcr abct abda abdo abec abed abee aber abet aboa abob abod aboo abor abot abra abrc abro abta ac-t acaa acab acac acad acae acar acat acba acca accc accd acce acco acct acda acdb acdc acde acdt ace- acea acec aced acer acet acoa acod acoe acor acot acr- acra acrc acre acro acrr acta actc acte acto actt adaa adab adac adad adae adao adar adat adba adbc adcc adda addc addd adde addo addr adea adeb adee adeo ader adet adob adoc adod adoe adoo ador adot adra adre adro adta aeac aecb aect aede aedt aeer aer- aera aerc aerd aero aeta aetc aeto aetr aett aoba aoca aoce aora aorb aort aotc aotd arab arac arad arae arar arat arba arbe arc- arca arce arco arct arda ardc arde ardo area arec ared aree areo aret aroa arob arod aroe aroo aror arr- arra arrc arre arro arrr arrt arta artc arte arto artr at-t ataa atab atac atad atae atar atat atca atcc atco atcr atdt atea atec ated atee ateo ater atob atoc atod atoe ator atot atra atrc atre atro atta atte atto attr baaa baad baar baat baba babb babe babo babr bac- baca bacc bace baco bact bada badb badd bade bado badr baed baer bar- bara barb barc bard bare baro barr bart bata batc bate bato batt bbad bbbb bbdd bbdo bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcda bcde bcec bcer bcet bcor bcra bctc bd-r bdbc bddc bead bear beat beba bebb bebe bebo beca beda bede bedo beeb beed beer beet beo- beod beor beot bera berc berd bere bero berr bert beta betc bete beto bett boab boac boad boar boat boba bobb bobe bobo boca boce boco boda bodb bode bodo boea boec boee boeo boer boet boob booc bood booe boor boot bor- bora bord bore boro borr bort bota botb botd bote boto bott brab brac brad brae brao brat brca brcb brce brda brdo brdt brea breb brec bred bree breo brer bret broa brob broc brod broe broo bror brot brrr brtc btaa btcc btdt btec btob btor btrc btrt bttb c-bo c-cd caaa caab caac caat caba cabe cabo cac- caca cacc cace caco cacr cada cadc cadd cade cado cadr caec caer caod caor cara carb carc card care caro carr cart cat- cata catb catc catd cate cato catt cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbdb cbdc cbdo cbea cbec cbee cber cbet cbot cbrd cbre cbrt cbta cbtc ccaa ccab ccac ccad ccar ccat ccba ccbc ccca cccb cccc ccdc ccdr cced ccee ccob ccoc ccod ccra ccrc ccre ccrt cctb cctc cctt cd-e cd-r cdaa cdac cdad cdba cdda cddb cddr cdec cder cdot cdre ceac cead cear ceat ceba cec- ceca cece ceco cect ceda cedd cede cedo cedt ceeb ceec ceor cer- cera cerc cerd cere cero cert cet- ceta cete ceto coad coat coba cobb cobe cobo coca coce coco coct coda codd code coed coob cood coot cor- cora corb corc cord core coro corr cort cota cotb cotc cote coto cott crab crac crar crat crbc crca crcc crce crcr crda crdc cre- crea creb crec cred cree creo cret crob croc crod croe croo cror crot crrt crtc ctab ctae ctba ctca ctec ctor ctot ctrc ctta d-bo daab daad daae daar daba dabb dabo dabt daca dace dact dada dade dado daeb daer dara darb darc dard dare daro darr dart data date dato datr datt dbar dbcc dbtt dcbc dcca dccb dccc dcct dcdb dcra dctc dddd ddoc ddot ddrc ddre deac dead deae dear deba debe debt dec- deca decc decd dece deco dect deda dedd dede dedo deeb deed deer deet deor der- dera derb derc dere dero derr deta dete deto detr doab doae doar doat doba dobb dobe doca doce doco doct dod- doda dodd dode dodo doea doer doob dood door doot dora dorc dord dore doro dorr dort dota dotd dote doto dott draa drab drac drad drar drat drba drbc drca drda drea dred dree dret drob drod drot drra dtaa dtac dtcc dted dtor dtot eaba eaca eacc eada eadb eadd eaec eara earb eard eare earo eart eata eate ebac ebba ebbc ebbo ebbr ebcc ebed eber eboe eboo ebor ebro ecaa ecac ecad ecao ecar ecat ecbc ecbe ecca eccb eccc ecce ecco ecct ecdc eced eco- ecod ecot ecra ecrc ecrr ect- ecta ectc ecto edac edad edar edca edda eddc edde eddo ede- edea eder edoc edod edra edta eeca eede eeea eeee eeoc eera eerc eero eeta eetc eete eocd eode eora eore eota eotc eotd eoto erad erat erba erbb erbe erca ercc erce erda erde ereb erec ered erer eret erob eroc erod eroe eroo erra errc erre erro erta etat etbc etbr etcc etco etec etee eter etoe etra etre etro etta ette etto o-eo oade oaer oara oare oate obad obba obbo obdt obea obec obed ober obet oboe obor obot obra obre obro obtd ocab ocac ocad ocat ocbc occa occc occt oce oced ocee ocet ocra ocre ocro ocrr oct- octa octe octo odac odbo odda oddd odea oded odeo oder odet odoo odor odot odra oec- oeca oecc oedo oeec oera oere oeta ooaa ooba oobe oocr ooda ooer oooo oora oord oore oort ootb orab orac orad orae orao orar orat orba orbb orbe orbo orca orce orco orda orde ordo ore- orea oreb orec ored oreo orer oro- oroe oror orot orra orro orta ortc orte orto otac otar otbd otcd otea