-vac a-ak aaaa aaac aaae aaav aaca aacc aace aack aacv aaea aaec aaev aaka aake aava acaa acac acae acca accc acce ace- acea acec acek acev acke acvv aeac aeka aeva akaa akae akca akee akka avcc avce avea avec avva caaa caac cac- caca cacc cace cack caec caka cake cava cave ccaa ccac ccca cccc cccv ccee ceac cec- ceca cece ceec ceke ceva ckac ckck ckcv cvac cvca cvcc eaca eacc eaec eave ecaa ecac ecca eccc ecce ecka eeca eeea eeee eeka eeke eeva eka- ekek ekka evac evae evea evvk kaaa kaak kacc kace kacv kaka kakc kake kakk kava kave kavv kcaa kcac kcav kcca kccc kcck kccv kcea kcec kcee kckc kckk kckv kcvk kcvv kea- keak keca keck keek keka kekc keke keva keve kkaa kkac kkck kkea kkkk kkvv kvak kvcc kvce kvck kvcv kvea kvec kvvv vaca vace vack vaka vake vava veak vecc veck veka veke veve vvvv