a-ak a-ya aaaa aaab aaac aaba aabb aabc aabt aaby aaca aacb aacc aack aact aacy aaka aata aatc aatk aatt abaa abab abac abak abat abay abb- abba abbb abbt abby abca abcb abcc abct abta abyc abyt abyy ac-t acaa acab acac acat acba acca accc acct accy acta actc actt akaa akay akca akka at-t ataa atab atac atak atat atay atca atcc atck atka atkt atta atty atya ayat ayay ayca ayta ayya baaa baak baat baba babb baby bac- baca bacc back bact bak- baka bakt bata batc batt baty baya bayt bbay bbbb bcaa bcat bcbc bcca bccc bctc bkcy btaa btcc bttb byck caaa caab caac caat caba caby cac- caca cacc cack caka caky cat- cata catb catc catt caty cbac cbat cbbc cbca cbcc cbct cbka cbta cbtc cbyt ccaa ccab ccac ccat ccba ccbc ccca cccb cccc cctb cctc cctt ckac ckat ckbc ckck ckcy cktb ckty ctab ctba ctca ctta cya- cyaa cyba cybb cybc cyc- cyca cycb cycc cyt- cyta cytb cyy- cyyc kaaa kaab kaak kaat kaay kaba kabb kabc kaby kacb kacc kact kacy kaka kakc kakk kakt kat- kata katb katc katk katt katy kaya kayt kbaa kbab kbac kbak kbat kbay kbba kbbb kbbc kbbk kbbt kbca kbcb kbck kbct kbcy kbkb kbkk kbky kbta kbtb kbtc kbtk kbtt kbya kbyb kcaa kcab kcac kcat kcba kcbc kcbk kcca kccb kccc kcck kcct kccy kckc kckk kcky kcta kctb kctc kcty kcya kcyk kcyt kcyy kkaa kkac kkat kkay kkba kkbb kkbt kkcb kkck kkct kkcy kkkk kktc kktk kkty kkya kkyc kkyy ktaa ktak ktat ktba ktbb ktbc ktbt ktby ktcc ktck ktcy ktkb ktkc ktkk ktkt kttc kttk kttt ktty kyaa kyak kyat kyay kyba kybb kybc kyby kyca kycc kyck kyct kyka kykc kykk kyky kytc kytt kyty kyya kyyk kyyt kyyy taa- taat taba tabb tabc taby taca tacc tack tact tacy taka takk takt taky tata tatb tatt taty taya tayk tayt tayy tbca tbcb tbcc tbta tcby tcca tccc tctc tkac ttab ttbb tttt tyck tyta tytt tyty yaak yaba yacc yack yacy yaka yata yaya ycab ycat yccc yctc ykyt ytak ytay ytky yyyy