-vac a-ha aaaa aaab aaac aaah aaar aaav aaba aabb aabc aabh aaca aacb aacc aach aacr aacv aaha aara aarc aava abaa abab abac abar abb- abba abbb abbr abca abcb abcc abch abcr abha abhr abra abrc abva acaa acab acac acar acba acca accc acch acha achh achr acr- acra acrc acrr acrv acvv ahab ahac ahah ahar ahha ahra ahrc ahrr ahva arab arac arah arar arba arbh arc- arca arch arh- arr- arra arrc arrh arrr arva avab avar avcc avra avva baaa baah baar baba babb babr bac- baca bacc bach baha bahr bar- bara barb barc barh barr bava bbbb bbch bbrc bcaa bcar bcbc bcca bccc bcra bhar bhca bhcc bhra brab brac brah brav brca brcb brrr caaa caab caac caah caba cac- caca cacc cach cacr caha cara carb carc carr cava cbac cbar cbbc cbca cbcc cbcr cbha cbrh cbva cbvb cbvr ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccv ccha cchr ccra ccrc chaa chab chac chah char chav chca chch chha chra chrb chrc chrr crab crac crar crbc crca crcc crcr cvac cvar cvca cvcc cvra cvrr haab haar haba haha hara harc harh harr harv hava hbar hcbc hcca hccb hccc hcch hhaa hhhh hrac hrrc hvac hvar hvcc raab raba rabb rac- raca racc rach racv raha rahr rara rarb rava rbbb rbbr rcac rcbc rccb rccc rchb rcvr rrah rrrr rv-c rvca rvvh vaar vaca vach vara varr vava vbcc vhhh vrac vrav vrba vvvv