a-ya a-yo aaaa aaab aaba aabb aabt aaby aaoo aata aatt abaa abab abat abay abb- abba abbb abbo abbt abby aboa abob aboo abot aboy abta abyt abyy aoba at-t ataa atab atat atay atob atot atoy atta atto atty atya ay-o ayao ayat ayay ayoo ayot ayta ayto ayya baaa baat baba babb babo baby bata bato batt baty baya bayo bayt bbay bbbb bboy bbyo boab boat boba bobb bobo boby boob boot bota botb boto bott boty boya boyo btaa btob bttb byoa byob oaty obay obba obbo obby obot oboy ooaa ooba ooby oooo ootb ooty otay oto- otoo otoy otta otto taa- taat taba tabb tabo taby taoa tata tatb tato tatt taty taya tayo tayt tayy tbta to-y toab toat toay toba tobo tobt toby tooa toot tota toto tott toty toya toyb toyo toyt ttab ttbb ttoy tttt tybo tyta tyto tytt tyty yaba yabo yata yaya yayo yoba yobo yoot yota yott yoyo ytay yyyy