aaaa aaab aaas aaav aaba aabb aabt aasa aass aast aasu aata aatt aaus aava abaa abab abas abat abau abb- abba abbb abbs abbt abs- absa abss absu abta abts abtu abua abus abut abva asaa asab asas asat asau asba asbu assa asss asst assu asta astb asts astv asub asus asva asvs at-t ataa atab atas atat atbs atsb atst atta atts attu atua atub atus atvs auaa ausa aust ausu aut- auts auvs avab avas avat avst avus avva baaa baas baat baba babb babs babu basa bass bast basu bata bats batt batu bau- bava bavu bbas bbau bbbb bbbs bsaa bsas bsat bsts bstv btaa btss bttb btus buat buba bubb bubs bubu busa buss bust busu but- buta buts butt buus s-vt saab saas saat saba sabb sabs sabu sasa sass sast sata satb sats satt satu saua saus saut sava savs savu sbaa sbas sbbs sbsa sbst sbus ssaa ssab ssas ssat ssau sssa sssb ssss ssta sstb ssts st-v stab stas stat stau stbs stss stub stus stut stuv stvs suas suat sub- suba subb subs sus- susa suss sust susu suta sutu suus suva suvs taa- taas taat taba tabb tabs tabu tasa tasb tass tast tasu tata tatb tats tatt tatu tatv taua taub taus taut tava tavs tbas tbbs tbst tbta tsaa tsat tsau tsav tssa tsst tsts ttab ttbb ttss tttt tuas tuat tuba tubb tubs tubu tusa tuss tust tuta tuts tutt tutu tuva tvbs tvsa tvss tvtv uasa uata uatu uatv uaua uavs ubba us-a usaa usas usat usba usbs ussa ussb usss usst ussu usta ustb usts usua usus utas utau utsa uttu uuta uuuu uv-a uv-b uvaa uvas uvat uvvu vaas vaat vabs vas- vasa vass vast vasu vata vats vatt vatu vaus vaut vava vavs vsta vutv vvsb vvvv