a-ya aaaa aaab aaac aaba aabb aabc aabt aaby aaca aacb aacc aact aacu aacy aata aatc aatt abaa abab abac abat abau abay abb- abba abbb abbt abby abca abcb abcc abct abta abtu abua abut abuy abyc abyt abyy ac-t acaa acab acac acat acba acca accc acct accu accy acta actc actt actu acu- acut at-t ataa atab atac atat atay atca atcc atta attu atty atua atub atuc atya auaa auby auca auct aut- auty ayat ayay ayca ayta ayub ayya baaa baat baba babb babu baby bac- baca bacc bact bata batc batt batu baty bau- baya bayt bayu bbau bbay bbbb bcaa bcat bcbc bcca bccc bctc bcuc btaa btcc bttb buat buba bubb bubu buca bucc bucu but- buta butt buty buyu caaa caab caac caat caba cabu caby cac- caca cacc cat- cata catb catc catt catu caty cauc caut cbac cbat cbbc cbca cbcc cbct cbcu cbta cbtc cbyt ccaa ccab ccac ccat ccba ccbc ccca cccb cccc cccu cctb cctc cctt ccuc ccut ctab ctba ctca ctta cuau cub- cuba cubb cuby cuca cucc cut- cuta cutc cutt cuy- cya- cyaa cyba cybb cybc cyc- cyca cycb cycc cyt- cyta cytb cyy- cyyc taa- taat taba tabb tabc tabu taby taca tacc tact tacy tata tatb tatt tatu taty taua taub tauc taut taya tayt tayu tayy tbca tbcb tbcc tbta tcby tcca tccc tccu tctc ttab ttbb tttt tuat tuay tuba tubb tubu tuca tucc tuta tutt tutu tuty tuya tyta tytt tyty uabc uaca uata uatu uaua ubac ubay ubba ucat ucbc ucca ucua ucut utac utau utby uttu uuta uuuu yaba yacc yacy yata yaya yayu ycab ycat yccc yctc ytay yuba yubu yuca yuta yutu yuty yuya yuyu yyyy