a-ya a-yo aaaa aaab aaaf aaba aabb aabt aaby aafa aafb aaff aaoo aata aatf aatt abaa abab abaf abat abay abb- abba abbb abbo abbt abby abff aboa abob abof aboo abot aboy abta abyt abyy afaa afao afat affa affo afft affy afoa afoo afta afty aoba aotf at-t ataa atab atat atay atfb atob atof atot atoy atta atto atty atya ay-o ayao ayat ayay ayoo ayot ayta ayto ayya baaa baaf baat baba babb babo baby baff bafo baft bata batf bato batt baty baya bayo bayt bbay bbbb bboy bbyo bfta bftt boab boat boba bobb bobo boby bofa boff boob boof boot bota botb boto bott boty boya boyf boyo btaa btaf btob bttb byoa byob faaa faba fabo fafa faff fafo fata fatf fato fatt faya fayo fayt ffff fftf foaf foba fobt fofo foof foot fota foto fott foty foya foyt ftfy oafo oaty obay obba obbo obby obot oboy ofay off- offa offo offy ofta ooaa ooba ooby ooff oofy oooo ootb ooty otay oto- otof otoo otoy otta otto taa- taaf taat taba tabb tabo taby tafa taff tafo taft taoa tata tatb tato tatt taty taya tayo tayt tayy tbaf tbta tbyf tfot to-y toab toat toay toba tobo tobt toby tofa toff tofo toft tooa toof toot tota toto tott toty toya toyb toyo toyt ttab ttbb ttfa ttff ttoy tttt tybo tyff tyft tyta tyto tytt tyty yaaf yaba yabo yafa yaff yafo yaft yata yaya yayo yoba yobo yoff yoof yoot yota yott yoyo ytay yyff yyyy