a-fu aaaa aaaf aaar aaav aafa aaff aaoo aara aaro aaru aava afaa afao afar affa affo afoa afoo afor afr- afra afro afru afua aora aouf araf arar arau arfa arff arfu aroa aroo aror arr- arra arro arrr arru arua arva arvo auaa aur- aura auro avao avar avor avou avra avro avur avva avvo faaa fafa faff fafo fara faro farr faru faur fava ffar ffff ffrr foaf foar fofo foof for- fora foro forr foua four fr-v frau frou fuar fuff fufu fuor fur- fura furo furr oaau oafo oara off- offa offo offr offu ofor ofra ooaa ooff oooo oora orao orar orav orff orfu oro- orof oror orra orro orvr ouff our- oura ouro ouu- ovar ovo- ovoo ovra raaf rafa raff rara rarf raro raua rauf rava roaf roar roff rofo roof roor rora roro roru roua rouf rova rovo rrrr rufa ruff rufo rura ruro ruru ruvu uafa uaru uaua uffa ufra uofa uofo uor- uovo urao urau urfa urff uro- uroa uroo urra urur urva uuuu uv-a uvaa uvvu vaar vafa vara varf varr varu vava vfor voar voff vofr voor vor- vora voro voru vour vrav vvvv