a-ha aaaa aaac aaah aaar aaca aacc aach aaco aacr aaha aaoo aara aarc aaro acaa acac acar acca accc acch acco acha achh acho achr acoa acoh acor acr- acra acrc acro acrr ahac ahah ahar ahha ahoa ahor ahra ahrc ahrr aoah aoca aora arac arah arar arc- arca arch arco arh- aroa aroo aror arr- arra arrc arrh arro arrr caaa caac caah cac- caca cacc cach caco cacr caha caor cara carc caro carr ccaa ccac ccar ccca cccc ccha cchr ccoc ccra ccrc chaa chac chah chao char chca chch chha choc choh choo chor chra chrc chro chrr coca coch coco coha coho cooh cor- cora corc coro corr crac crar crca crcc crcr croc croh croo cror haar haco haha haho haor hara harc harh haro harr hcca hccc hcch hhaa hhhh hoac hoar hoca hoch hocr hoha hoho hoor hora horc horo horr hrac hrrc oara ocac occa occc ocha ocra ocro ocrr ohcc ohho ohoh ohra ooaa oocr ooha ooho oooh oooo oora orac orah orao orar orca orch orco oro- oror orra orro rac- raca racc rach raco raha rahr raoc raoh rara raro rcac rccc rhoa rhoc rhoh roar roca rocc roch roco roha rohr roor rora rorc roro rrah rrrr