a-ya aaaa aaab aaad aaba aabb aabd aabt aaby aada aadt aata aatt abaa abab abad abat abay abb- abba abbb abbt abby abda abdy abta abyt abyy adaa adab adad adat aday adba adda addd addy adta adya adyt at-t ataa atab atad atat atay atdt atta atty atya ayad ayat ayay ayda ayta ayya baaa baad baat baba babb baby bada badb badd bady bata batt baty baya bayt bbad bbay bbbb bbdd bday btaa btdt bttb byyd daab daad daba dabb dabt dada dady data datt daya dayt dbtt dday dddd dtaa dya- dyab dyad dyat dybt dydd dyt- dyty taa- taat taba tabb taby tada tata tatb tatt taty taya tayt tayy tbta tddb ttab ttbb tttt ttyd tydd tydy tyta tytd tytt tyty yaba yada yata yaya ydad yday ydyt ytay yyyy