aaaa aaaf aaap aaar aafa aaff aaoo aapa aapo aara aaro aarp afaa afao afap afar affa affo afoa afoo afor afpa afr- afra afro aopo aora apao apap apar apfa apfo apo- apof apoo apop apor appa appr apra apro araf arap arar arfa arff aroa aroo aror arpa arr- arra arro arrr faaa faap fafa faff fafo fapa fapp fara faro farp farr ffar ffff ffrr foaf foar fofo foof fopp for- fora foro forr fpaa fpra fprf frap frop oafo oara off- offa offo offr ofor ofra ooaa ooff oooo oora opap opar opo- opor oppa oppo opra orao orar orff oro- orof oror orra orro paap paar pafa paff papa papp papr par- para parf paro parp parr pfaa pfff pffr pfra poar poff poof poop poor pop- popa popo popp pora poro porr ppap ppar ppfa ppoa pppa pppo pppp pprf prao prar pro- proa prof proo prop raaf rafa raff raop rapa rapp rara rarf raro roaf roap roar roff rofo roof roop roor ropa ropo rora roro rpof rrrr