a-fu aaaa aaab aaaf aaal aaas aaba aabb aabl aafa aafb aaff aafl aala aall aals aalu aasa aasf aass aasu aaus abaa abab abaf abal abas abau abb- abba abbb abbs abff abla abls abs- absa absf absl abss absu abua abuf abul abus afaa afbs affa affs afla afsa afsb afua afus alaa alal alas alau alb- alba albs albu alfa alfs all- alla alll alls allu alsa alua aluf alus asaa asab asaf asal asas asau asba asbu asfa asla assa assl asss assu asub asus auaa aufs aul- aula aulf aull auls aulu ausa ausu baaa baaf baal baas baba babb babs babu baff bala balf ball bals balu basa basf bass basu bau- bauf baul bbas bbau bbbb bbbs bblb bbls bfas bffl bffs blaa blab blas blau blls blss blub bluf blus bsaa bsas bsfa bsff bsfs bual buba bubb bubs bubu buff bula bulb bull buls bulu busa buss busu buus faaa faas faba fabs fabu fafa faff fala fall fals falu fasa fass faul fbla fbus ffff ffsa ffss flab flub fluf flus fsas fssa fssf fubb fubs fubu fuff fufu fula full fuls fulu fusa fuss fusu laaa laal laas laba labs labu lafb laff lala lall lalu lasa lass lasu laub lauf laul laus llbs llll lsbu lsla lssa luas luau luba lubs luff lufu lula lull lulu lusa luss luua saab saaf saal saas saba sabb sabs sabu safa safb saff safu sala salf sall sals salu sasa sasf sasl sass saua sauf saul saus sbaa sbas sbbs sbsa sbus sfas sfba sfla sfls sfss sfsu slaa slab slaf slas slau slsa slsu slub ssaa ssab ssas ssau ssfl ssla sssa sssb sssf ssss suas sub- suba subb subl subs suf- sufa suff sufs sufu sul- sula sulf sull sulu sus- susa suss susu suus uafa uasa uaua ubal ubba ubla ubls uffa ulaa ulas ulla ulsa ulua ulul ulus us-a usaa usaf usal usas usba usbl usbs usfa usfl usfs uslu ussa ussb ussf usss ussu usua usul usus uulu uuuu