a-fu aaaa aaaf aaar aaas aafa aaff aara aars aaru aasa aasf aass aasu aaus afaa afar affa affs afr- afra afrs afru afsa afua afus araf arar aras arau arfa arff arfs arfu arr- arra arrr arrs arru ars- arsa arsu arua asaa asaf asar asas asau asfa asra asrs asru assa assr asss assu asur asus auaa aufs aur- aura ausa ausu faaa faas fafa faff fara farr fars faru fasa fass faur ffar ffff ffrr ffsa ffss fras frau fsas fsra fssa fssf fuar fuff fufu fur- fura furr furs fusa fuss fusu raaf raas rafa raff rara rarf rars rasa rass rasu raua rauf raus rras rrrr rsaa rsaf rssa rsua ruas rufa ruff rura rurs ruru rusa russ rusu saaf saar saas safa saff safr safu sara sarf sarr sars saru sasa sasf sass saua sauf saur saus sfar sfas sfra sfss sfsu sraf sras ssaa ssas ssau ssra ssrs sssa sssf ssss suar suas suf- sufa suff sufr sufs sufu sur- sura surf surr surs suru sus- susa suss susu suus uafa uars uaru uasa uaua uffa ufra uras urau urfa urff urra ursa urss ursu urur urus us-a usaa usaf usar usas usfa usfs usra ussa ussf ussr usss ussu usua usus uuuu