a-ya aaaa aaab aaas aaba aabb aabt aaby aasa aass aast aata aatt abaa abab abas abat abay abb- abba abbb abbs abbt abby abs- absa abss abta abts abys abyt abyy asaa asab asas asat asay asba asby assa asss asst assy asta astb asts asty asya at-t ataa atab atas atat atay atbs atsb atst atta atts atty atya atys ayas ayat ayay ayta ayya baaa baas baat baba babb babs baby basa bass bast bata bats batt baty baya bays bayt bbas bbay bbbb bbbs bsaa bsas bsat bsts btaa btss bttb byas bysb byss byst bysy byts saab saas saat saba sabb sabs sasa sass sast sata satb sats satt saya says sbaa sbas sbbs sbsa sbst ssaa ssab ssas ssat ssby sssa sssb ssss ssta sstb ssts stab stas stat stay stbs stss stys syss syst sytt taa- taas taat taba tabb tabs taby tasa tasb tass tast tasy tata tatb tats tatt taty taya tays tayt tayy tbas tbbs tbst tbta tsaa tsat tssa tsst tsts tsys ttab ttbb ttss tttt ttys tyas tysa tyss tyst tyta tytt tyty yaas yaba yasa yass yast yata yats yaya yays ybas ybbs ysay ysby ysyb ytay yyyy