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 ahaq ahar ahha ahra ahrc ahrq ahrr aqar aqra arac arah araq arar arc- arca arch arh- arq- arqa arr- arra arrc arrh arrr caaa caac caah cac- caca cacc cach cacr caha caqh cara carc carr ccaa ccac ccar ccca cccc ccha cchr ccra ccrc chaa chac chah char chca chch chha chqr chra chrc chrr crac crar crca crcc crcr haar haha hara harc harh harr hcca hccc hcch hhaa hhhh hqac hrac hrrc qa-c qaha qara qqqq rac- raca racc rach racq raha rahr rara rcac rccc rrah rrrr