a-ya a-yo aaaa aaab aaac aaba aabb aabc aabt aaby aaca aacb aacc aaco aact aacy aaoo aata aatc aatt abaa abab abac abat abay abb- abba abbb abbo abbt abby abca abcb abcc abct aboa abob aboo abot aboy abta abyc abyt abyy ac-t acaa acab acac acat acba acca accc acco acct accy acoa acot acoy acta actc acto actt aoba aoca aotc at-t ataa atab atac atat atay atca atcc atco atob atoc atot atoy atta atto atty atya ay-o ayao ayat ayay ayca ayoo ayot ayta ayto ayya baaa baat baba babb babo baby bac- baca bacc baco bact bata batc bato batt baty baya bayo bayt bbay bbbb bboy bbyo bcaa bcat bcbc bcca bccc bctc boab boac boat boba bobb bobo boby boca boco boob booc boot bota botb boto bott boty boya boyo btaa btcc btob bttb byoa byob byoc c-bo caaa caab caac caat caba cabo caby cac- caca cacc caco cat- cata catb catc cato catt caty cayo cbac cbat cbbc cbca cbcc cbct cbot cbta cbtc cbyt ccaa ccab ccac ccat ccba ccbc ccca cccb cccc ccob ccoc cctb cctc cctt coat coba cobb cobo coby coca coco coct coob coot cota cotb cotc coto cott coty coya coyo coyt ctab ctba ctca ctot ctta cya- cyaa cyba cybb cybc cybo cyc- cyca cycb cycc cyoa cyt- cyta cytb cyto cyy- cyyc oaty obay obba obbo obby obot oboy ocab ocac ocat ocbc occa occc occt oct- octa octo octy ooaa ooba ooby oooo ootb ooty otac otay oto- otoo otoy otta otto taa- taat taba tabb tabc tabo taby taca tacc taco tact tacy taoa tata tatb tato tatt taty taya tayo tayt tayy tbca tbcb tbcc tbta tcby tcca tccc tctc to-y toab toat toay toba tobo tobt toby toca toco tooa toot tota totc toto tott toty toya toyb toyo toyt ttab ttbb ttoy tttt tybo tyco tyta tyto tytt tyty yaba yabo yacc yaco yacy yata yaya yayo ycab ycao ycat yccc yctc yoba yobo yoot yota yott yoyo ytay yyyy