a-ha aaaa aaac aaaf aaah aaar aaca aacc aacf aach aaco aacr aafa aafc aaff aaha aaoo aara aarc aaro acaa acac acar acca accc accf acch acco acfc acha achh acho achr acoa acoh acor acr- acra acrc acro acrr afaa afao afar afca afcc afch affa affc affo afoa afoo afor afr- afra afrc afro ahac ahah ahar ahfa ahha ahoa ahor ahra ahrc ahrr aoah aoca aora arac araf arah arar arc- arca arch arco arfa arfc arff arh- aroa aroo aror arr- arra arrc arrh arro arrr caaa caac caaf caah cac- caca cacc cach caco cacr cafa cafc caff caha caor cara carc carf caro carr ccaa ccac ccaf ccar ccca cccc cccf ccfa ccfc ccff ccha cchr ccoc ccra ccrc ccrf cfaa cfac cfao cfar cfca cfcf cfco cffr cfoa cfor cfra chaa chac chaf chah chao char chca chch chfa chfc chfr chha choc choh choo chor chra chrc chrf chro chrr coca coch coco cofc coff coha coho coof cooh cor- cora corc corf coro corr crac craf crar crca crcc crcr crfc croc croh croo cror faaa faac faah faca facc fach fafa fafc faff fafo faha fahr fara farc faro farr fcar fcca fccf fcch fcra ffar ffcc ffff ffrr foaf foar foca foch foco fofo fohr foof for- fora foro forr frac frcc frfc froh haaf haar haco haff haha haho haor hara harc harf harh haro harr hcca hccc hcch hcfa hcfc hhaa hhhh hhof hoac hoar hoca hoch hocr hoff hoha hoho hoof hoor hora horc horo horr hrac hrfc hrrc oafc oafo oara ocac occa occc ocfa ocha ocra ocro ocrr ofah ofcr off- offa offc offh offo offr ofor ofra ohcc ohho ohoh ohra ooaa oocr ooff ooha ooho oooh oooo oora orac orah orao orar orca orch orco orff oro- orof oror orra orro raaf rac- raca racc rach raco rafa rafc raff raha rahr raoc raoh rara rarf raro rcac rcaf rccc rcfc rffc rhoa rhoc rhoh roaf roar roca rocc roch roco rofc roff rofo roha rohr roof roor rora rorc roro rrah rrfc rrrr