a-ha aaaa aaac aaah aaar aaca aacc aach aacr aaha aara aarc acaa acac acar acca accc acch acha achh achr acr- acra acrc acrr ahac ahah ahar ahha ahra ahrc ahrr arac arah arar arc- arca arch arh- arr- arra arrc arrh arrr caaa caac caah cac- caca cacc cach cacr caha cara carc carr ccaa ccac ccar ccca cccc ccha cchr ccra ccrc chaa chac chah char chca chch chha chra chrc chrr crac crar crca crcc crcr haar haha hara harc harh harr hcca hccc hcch hhaa hhhh hrac hrrc rac- raca racc rach raha rahr rara rcac rccc rrah rrrr