a-ya aaaa aaab aaaf aaba aabb aabt aaby aafa aafb aaff aata aatf aatt abaa abab abaf abat abay abb- abba abbb abbt abby abff abta abyt abyy afaa afat affa afft affy afta afty at-t ataa atab atat atay atfb atta atty atya ayat ayay ayta ayya baaa baaf baat baba babb baby baff baft bata batf batt baty baya bayt bbay bbbb bfta bftt btaa btaf bttb faaa faba fafa faff fata fatf fatt faya fayt ffff fftf ftfy taa- taaf taat taba tabb taby tafa taff taft tata tatb tatt taty taya tayt tayy tbaf tbta tbyf ttab ttbb ttfa ttff tttt tyff tyft tyta tytt tyty yaaf yaba yafa yaff yaft yata yaya ytay yyff yyyy