a-ii aaaa aaab aaai aaas aaba aabb aabi aaib aaii aais aasa aasi aass aasu aaus abaa abab abai abas abau abb- abba abbb abbi abbs abia abib abis abiu abs- absa absi abss absu abua abus aiai aias aiba aiia aiib aisa aisb aisi aiui asaa asab asai asas asau asba asbu asia asii asis assa assi asss assu asub asui asus auaa auis ausa ausu ba-i baaa baas baba babb babi babs babu baia baib bais basa basi bass basu bau- bbas bbau bbbb bbbs bias biba bibb bibi bibs biis bis- bisa biss bisu bsaa bsas buba bubb bubi bubs bubu buis buiu busa busi buss busu buus iaaa iaai iaas iaba iaia iais iasa iasi ibas ibia ibis ibsa ibss ibus iias iiii iiis iisi iisu is-a isai isas isba isia isis issa issi isss issu isua isus iuiu iuss s-ib s-ii saab saas saba sabb sabi sabs sabu saia sais sasa sasi sass saua saus sbaa sbai sbas sbbs sbia sbsa sbsi sbus siaa siab siai sias siau siba sibi sibs sibu sisa sisi siss sisu siui sius ssaa ssab ssas ssau ssis sssa sssb sssi ssss suas sub- suba subb subi subs suis sus- susa susi suss susu suus uasa uaua ubba ubbi ubii ubis us-a usaa usas usba usbs usia usis ussa ussb usss ussu usua usui usus uusi uuuu