-vac a-ak a-be a-ok aaaa aaab aaac aaae aaar aaav aaba aabb aabc aaca aacb aacc aace aack aaco aacr aacv aaea aaec aaev aaka aake aaoe aaoo aara aarc aare aaro aava abaa abab abac abae abak abar abb- abba abbb abbe abbo abbr abca abcb abcc abcr abec abee aber aboa abob abok aboo abor abov abra abrc abro abva acaa acab acac acae acar acba acca accc acce acco ace- acea acec acek acer acev acke acoa acoe acor acr- acra acrc acre acro acrr acrv acvv aeac aecb aeer aeka aer- aera aerc aero aeva akaa akae akao akar akca akee aker akka akko akok akr- akra akre aoba aoca aoce aora aorb arab arac arae arak arar arba arbe arc- arca arce arco area arec aree arek areo arev arka arke arko aroa arob aroe aroo aror arr- arra arrc arre arrk arro arrr arva arve arvo avab avao avar avcc avce avco avea avec aveo aver avor avra avre avro avva avvo baaa baak baar baba babb babe babo babr bac- baca bacc bace back baco baek baer bak- baka bake bako bakr bar- bara barb barc bare bark baro barr bava bave bbbb bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bcor bcra bcvo beak bear beav beba bebb bebe bebo beca beck beeb beek beer beka beke beko beo- beok beor bera berc bere berk bero berr bevo boab boac boak boar boba bobb bobe bobo boca boce bock boco boea boec boee boeo boer boka boke boko boob booc booe book boor bor- bora bore bork boro borr bova bove bovo brab brac brae brak brao brav brca brcb brce brea breb brec bree brek breo brer brev brka brkb broa brob broc broe brok broo bror brrr c-bo caaa caab caac caba cabe cabo cac- caca cacc cace cack caco cacr caec caer caka cake caor cara carb carc care cark caro carr cava cave cavo cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbka cbko cbkr cbre cbva cbvb cbve cbvr ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccv ccee ccob ccoc ccra ccrc ccre ccvo ceac cear ceba cec- ceca cece ceco ceeb ceec ceke ceor cer- cera cerc cere cero ceva cevo ckac ckbc ckbe ckck ckco ckcv cker ckoa ckob ckoc ckoo ckor ckrc ckvo coak coba cobb cobe cobo coca coce cock coco cok- coka coke coko coob cook cor- cora corb corc core cork coro corr cova cove covo crab crac crar crbc crca crcc crce crcr cre- crea creb crec cree creo crkc crob croc croe crok croo cror cvac cvar cvca cvcc cver cvra cvrr eaba eaca eacc eaec eara earb eare earo eave ebac ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ecaa ecac ecao ecar ecbc ecbe ecca eccb eccc ecce ecco ecka ecko eco- ecra ecrc ecrr ecrv eeca eeea eeee eeka eeke eeoc eera eerc eero eeva eka- ekab ekco ekeb ekek eker ekka ekoa eoka eora eore erba erbb erbe erca ercc erce ereb erec erer erev erke erob eroc eroe eroo erra errc erre erro erve evac evae evar evea ever evoe evoo evra evre evvk kaaa kaab kaak kaar kaba kabb kabc kabe kabo kabr kacb kacc kace kaco kacv kaeo kaer kaka kakc kake kakk kako kaoa kaoc kaok kaor kara karb kare kark karo karr karv kava kavb kave kavo kavv kbaa kbab kbac kbae kbak kbar kbba kbbb kbbc kbbe kbbk kbbo kbbr kbca kbcb kbce kbck kbco kbcr kbeb kbec kbee kbek kbeo kber kbev kbkb kbkk kbko kbkr kbkv kboa kbob kboc kboe kbok kboo kbov kbra kbrb kbrc kbre kbrk kbro kbrv kbva kbvb kbvc kbvo kbvr kcaa kcab kcac kcar kcav kcba kcbc kcbk kcbr kcca kccb kccc kcck kccr kccv kcea kceb kcec kcee kceo kckc kckk kcko kckr kckv kcob kcoe kcor kcrc kcro kcrr kcrv kcvk kcvo kcvr kcvv kea- keak kear keba kebb kebc kebe kebr keca keck keco kecr keek keer keka kekb kekc keke keko keok ker- kera kerb kerc kere kerk kero kerr kerv keva keve kkaa kkac kkar kkba kkbb kkbe kkbo kkbr kkcb kkck kkco kkcr kkea kkkk kkoa kkob kkoo kkor kkov kkrb kkrc kkre kkrk kkro kkrr kkrv kkvr kkvv koab koac koae koak koar koba kobb kobc kobe kobk kobo kobr koca kocb kock koea koka kokb kokc koke kokk koko kokr koob kooc kook kooo koor koov kora korb korc kore kork koro korr korv kova kovc kove kovk kovo kovr krab krac krae krak krar krav krba krbb krbe krbk krbr krca krcb krcc krce krco krea kreb krec kree krek kreo krev krka krkc krke krkk krko krkr krkv kroa krob kroc kroe krok kroo kror krov krrb krrc krre krrk krro krrr krva krvb krvc krve krvk krvo krvr krvv kvab kvak kvar kvbc kvbr kvcb kvcc kvce kvck kvco kvcr kvcv kvea kvec kver kvoa kvob kvoc kvoe kvok kvoo kvor kvov kvra kvrc kvre kvro kvrr kvrv kvvr kvvv o-eo oaer oake oara oare obak obba obbo obea obec ober obkb oboe obok obor obra obre obro ocab ocac ocak ocbc occa occc oce ocee ocke ocra ocre ocro ocrr oec- oeca oecc oeec oera oere okak oker okka okko okok okor okra okre okro ooaa ooak ooba oobe oocr ooer oooo oora oore orab orac orae orak orao orar orav orba orbb orbe orbo orca orce orco ore- orea oreb orec orek oreo orer orka orke orko oro- oroe orok oror orra orro orve orvr ovar ovee over ovo- ovoo ovra ovre raab raak raba rabb rabe rabk rabo rac- raca racc race rack raco racv raec raer raka rake rakk raob raoc raok rara rarb rare rark raro rava rave rbbb rbbr rcac rcbc rcbo rccb rccc rcvr rea- reac reae reak reao rear reba rebb rebe rebk rebo reca recc rece reck recr reeb reek reev reka reke reko