a-ya a-yo aaaa aaab aaas aaba aabb aaby aaoo aasa aass abaa abab abas abay abb- abba abbb abbo abbs abby aboa abob aboo abos aboy abs- absa abss abys abyy aoba aoss asaa asab asao asas asay asba asbo asby asob asos assa asso asss assy asya ay-o ayao ayas ayay ayoo ayos ayya baaa baas baba babb babo babs baby baos basa baso bass baya bayo bays bbas bbay bbbb bbbs bboy bbyo boab boas boba bobb bobo bobs boby boob boos bosa boso boss boya boyo boys bsaa bsas bsos byas byoa byob byos bysb byso byss bysy oass oasy obas obay obba obbo obby obos oboy obss ooaa ooba ooby oooo ooos oosa osas osay osba osby osoo osos ossa ossb osso ossy oyas oyss s-os saab saas saba sabb sabo sabs saos sasa saso sass saya sayo says sbaa sbas sbbs sbsa soas soay soba sobo sobs soos sooy sosa soso soss soya soyo soys ssaa ssab ssao ssas ssby sssa sssb ssss sybo syso syss yaas yaba yabo yasa yaso yass yaya yayo yays ybas ybbs yoba yobo yobs yoso yoyo ysay ysby ysyb yyyy