-vac a-be aaaa aaab aaac aaae aaar aaav aaba aabb aabc aabt aaca aacb aacc aace aaco aacr aact aacv aaea aaec aaev aaoe aaoo aara aarc aare aaro aart aata aatc aatt aava abaa abab abac abae abar abat abb- abba abbb abbe abbo abbr abbt abca abcb abcc abcr abct abec abee aber abet aboa abob aboo abor abot abov abra abrc abro abta abva ac-t acaa acab acac acae acar acat acba acca accc acce acco acct ace- acea acec acer acet acev acoa acoe acor acot acr- acra acrc acre acro acrr acrv acta actc acte acto actt actv acvv aeac aecb aect aeer aer- aera aerc aero aeta aetc aeto aetr aett aeva aoba aoca aoce aora aorb aort aotc arab arac arae arar arat arba arbe arc- arca arce arco arct area arec aree areo aret arev aroa arob aroe aroo aror arr- arra arrc arre arro arrr arrt arta artc arte arto artr artv arva arve arvo at-t ataa atab atac atae atar atat atca atcc atco atcr atea atec atee ateo ater atob atoc atoe ator atot atra atrc atre atro atta atte atto attr avab avao avar avat avcc avce avco avea avec aveo aver avor avot avra avre avro avva avvo baaa baar baat baba babb babe babo babr bac- baca bacc bace baco bact baer bar- bara barb barc bare baro barr bart bata batc bate bato batt bava bave bbbb bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcec bcer bcet bcor bcra bctc bcvo bear beat beav beba bebb bebe bebo beca beeb beer beet beo- beor beot bera berc bere bero berr bert beta betc bete beto bett betv bevo boab boac boar boat boba bobb bobe bobo boca boce boco boea boec boee boeo boer boet boob booc booe boor boot bor- bora bore boro borr bort bota botb bote boto bott bova bove bovo brab brac brae brao brat brav brca brcb brce brea breb brec bree breo brer bret brev broa brob broc broe broo bror brot brrr brtc btaa btcc btec btob btor btrc btrt bttb c-bo caaa caab caac caat caba cabe cabo cac- caca cacc cace caco cacr caec caer caor cara carb carc care caro carr cart cat- cata catb catc cate cato catt catv cava cave cavo cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbea cbec cbee cber cbet cbot cbre cbrt cbta cbtc cbtv cbva cbvb cbve cbvr ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc cccv ccee ccob ccoc ccra ccrc ccre ccrt cctb cctc cctt cctv ccvo ceac cear ceat ceba cec- ceca cece ceco cect ceeb ceec ceor cer- cera cerc cere cero cert cet- ceta cete ceto cetv ceva cevo coat coba cobb cobe cobo coca coce coco coct coob coot cor- cora corb corc core coro corr cort cota cotb cotc cote coto cott cova cove covo crab crac crar crat crbc crca crcc crce crcr cre- crea creb crec cree creo cret crob croc croe croo cror crot crrt crtc crtv ctab ctae ctba ctca ctec ctor ctot ctrc ctta ctvo ctvt cvac cvar cvca cvcc cver cvet cvra cvrr cvte eaba eaca eacc eaec eara earb eare earo eart eata eate eave ebac ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ecaa ecac ecao ecar ecat ecbc ecbe ecca eccb eccc ecce ecco ecct eco- ecot ecra ecrc ecrr ecrv ect- ecta ectc ecto ectv eeca eeea eeee eeoc eera eerc eero eeta eetc eete eeva eora eore eota eotc eoto erat erba erbb erbe erca ercc erce ereb erec erer eret erev erob eroc eroe eroo erra errc erre erro erta erve etat etbc etbr etcc etco etec etee eter etoe etra etre etro etta ette etto etvo evac evae evar evat evea ever evet evoe evoo evra evre o-eo oaer oara oare oate obba obbo obea obec ober obet oboe obor obot obra obre obro ocab ocac ocat ocbc occa occc occt oce ocee ocet ocra ocre ocro ocrr oct- octa octe octo oec- oeca oecc oeec oera oere oeta ooaa ooba oobe oocr ooer oooo oora oore oort ootb orab orac orae orao orar orat orav orba orbb orbe orbo orca orce orco ore- orea oreb orec oreo orer oro- oroe oror orot orra orro orta ortc orte orto orve orvr otac otar otea otee oter oto- otoe otoo otor otov otra otre otro otta otte otto ovar ovee over ovet ovo- ovoo ovot ovra ovre raab raat raba rabb rabe rabo rac- raca racc race raco ract racv raec raer raob raoc rara rarb rare raro rata rate rato ratt rava rave rbbb rbbr rcac rcbc rcbo rccb rccc rcet rctc rctv rcvr rea- reac reae reao rear reat reba rebb rebe rebo reca recc rece recr rect reeb reet reev reot rera rere rero rert reta rete reto retr rett reva reve revo roab roar roat rob- roba robb robe robo robt roca rocc roce roco roea roer roet roev roob roor root rora rorc rore roro rort rota rotc rote roto rotr rott rova rove rovo rrat rrrr rtca rtcc rtce rtee rtva rtve rv-c rvca rver taa- taar taat taba tabb tabc tabe tabo taca tacc tace taco tact tacv taec taer taoa taor tara tarb tarc tare taro tarr tart tata tatb tate tato tatr tatt tatv tava tave tavo tbar tbca tbcb tbcc tbce tbrb tbta tcca tccc tcov tctc teac tear teat teba tebo teca teco tecr tect teec teer teet teev teor ter- tera terc tere tero terr teta tete teto tetr tett teva toab toat toba tobe tobo tobt toca toce toco toea toee toer toet tooa toor toot tora torc tore toro torr tort torv tota totc tote toto totr tott tova tove tovo traa trab trac trae trao trat trav trca trcc tre- trea trec tree treo tret trev troa troc troe troo trot trra trtc trte trtr ttab