a-ha aaaa aaac aaaf aaah aaar aaca aacc aacf aach aacr aafa aafc aaff aaha aara aarc acaa acac acar acca accc accf acch acfc acha achh achr acr- acra acrc acrr afaa afar afca afcc afch affa affc afr- afra afrc ahac ahah ahar ahfa ahha ahra ahrc ahrr arac araf arah arar arc- arca arch arfa arfc arff arh- arr- arra arrc arrh arrr caaa caac caaf caah cac- caca cacc cach cacr cafa cafc caff caha cara carc carf carr ccaa ccac ccaf ccar ccca cccc cccf ccfa ccfc ccff ccha cchr ccra ccrc ccrf cfaa cfac cfar cfca cfcf cffr cfra chaa chac chaf chah char chca chch chfa chfc chfr chha chra chrc chrf chrr crac craf crar crca crcc crcr crfc faaa faac faah faca facc fach fafa fafc faff faha fahr fara farc farr fcar fcca fccf fcch fcra ffar ffcc ffff ffrr frac frcc frfc haaf haar haff haha hara harc harf harh harr hcca hccc hcch hcfa hcfc hhaa hhhh hrac hrfc hrrc raaf rac- raca racc rach rafa rafc raff raha rahr rara rarf rcac rcaf rccc rcfc rffc rrah rrfc rrrr