a-ii aaaa aaab aaaf aaai aaas aaba aabb aabi aafa aafb aaff aafi aaib aaii aais aasa aasf aasi aass abaa abab abaf abai abas abb- abba abbb abbi abbs abff abia abib abis abs- absa absf absi abss afaa afbs affa affi affs afia afib afif afis afsa afsb aiai aias aiba aiff aifs aiia aiib aisa aisb aisi asaa asab asaf asai asas asba asfa asfi asia asif asii asis assa assi asss ba-i baaa baaf baas baba babb babi babs baff baia baib bais basa basf basi bass bbas bbbb bbbs bfas bffs bfsi biaf bias biba bibb bibi bibs bifa biff bifi biis bis- bisa biss bsaa bsas bsfa bsff bsfs faaa faas faba fabi fabs fafa faff fafi fais fasa fasi fass fbis ffff ffii ffsa ffss fiaa fiaf fias fiba fibs fifa fiff fifi fiii fisa fisi fiss fsai fsas fsfi fsia fssa fssf iaaa iaai iaas iaba iaff iaia iais iasa iasi ibas ibfi ibia ibis ibsa ibsf ibss ifaa ifas ifbb ifis ifsa ifsb iias iifa iiii iiis iisi is-a isaf isai isas isba isfa isia isis issa issf issi isss s-ib s-ii saab saaf saas saba sabb sabi sabs safa safb saff safi saia saif sais sasa sasf sasi sass sbaa sbai sbas sbbs sbia sbsa sbsi sfas sfba sfia sfss siaa siab siaf siai sias siba sibi sibs sifa siff sisa sisi siss ssaa ssab ssas ssis sssa sssb sssf sssi ssss