aaaa aaaf aaap aaar aaav aafa aaff aaoo aapa aapo aara aaro aarp aava 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 arva arvo avao avar avor avra avro avva avvo faaa faap fafa faff fafo fapa fapp fara faro farp farr fava ffar ffff ffrr foaf foar fofo foof fopp for- fora foro forr fpaa fpra fprf fr-v frap frop oafo oara off- offa offo offr ofor ofra ooaa ooff oooo oora opap opar opo- opor oppa oppo opra orao orar orav orff oro- orof oror orra orro orvr ovar ovo- ovoo ovpp ovra paap paar pafa paff papa papp papr par- para parf paro parp parr parv pava pavo pfaa pfff pffr pfra poar poff poof poop poor pop- popa popo popp pora poro porr povo ppap ppar ppfa ppoa pppa pppo pppp pprf prao prar pro- proa prof proo prop prov pvpa raaf rafa raff raop rapa rapp rara rarf raro rava roaf roap roar roff rofo roof roop roor ropa ropo rora roro rova rovo rpof rrrr vaar vafa vapa vara varf varp varr vava vfor voar voff vofr voor vor- vora voro vpro vrap vrav vvvv