-vac a-ak a-ok aaaa aaac aaae aaav aaca aacc aace aack aaco aacv aaea aaec aaev aaka aake aaoe aaoo aava acaa acac acae acca accc acce acco ace- acea acec acek acev acke acoa acoe acvv aeac aeka aeva akaa akae akao akca akee akka akko akok aoca aoce avao avcc avce avco avea avec aveo avva avvo caaa caac cac- caca cacc cace cack caco caec caka cake cava cave cavo ccaa ccac ccca cccc cccv ccee ccoc ccvo ceac cec- ceca cece ceco ceec ceke ceva cevo ckac ckck ckco ckcv ckoa ckoc ckoo ckvo coak coca coce cock coco cok- coka coke coko cook cova cove covo cvac cvca cvcc eaca eacc eaec eave ecaa ecac ecao ecca eccc ecce ecco ecka ecko eco- eeca eeea eeee eeka eeke eeoc eeva eka- ekco ekek ekka ekoa eoka evac evae evea evoe evoo evvk kaaa kaak kacc kace kaco kacv kaeo kaka kakc kake kakk kako kaoa kaoc kaok kava kave kavo kavv kcaa kcac kcav kcca kccc kcck kccv kcea kcec kcee kceo kckc kckk kcko kckv kcoe kcvk kcvo kcvv kea- keak keca keck keco keek keka kekc keke keko keok keva keve kkaa kkac kkck kkco kkea kkkk kkoa kkoo kkov kkvv koac koae koak koca kock koea koka kokc koke kokk koko kooc kook kooo koov kova kovc kove kovk kovo kvak kvcc kvce kvck kvco kvcv kvea kvec kvoa kvoc kvoe kvok kvoo kvov kvvv o-eo oake ocac ocak occa occc oce ocee ocke oec- oeca oecc oeec okak okka okko okok ooaa ooak oooo ovee ovo- ovoo vaca vace vack vaco vaka vake vava veak vecc veck veka veke veve vevo voca voce voka voke vooc vovk vvvv