a-ak a-ii aaaa aaab aaac aaai aaba aabb aabc aabi aabt aaca aacb aacc aaci aack aact aaib aaic aaii aaka aata aatc aatk aatt abaa abab abac abai abak abat abb- abba abbb abbi abbt abca abcb abcc abci abct abia abib abic abit abta ac-t acaa acab acac acai acat acba acca accc acci acct aci- acia acic acta actc acti actt aiai aiba aica aicc aiia aiib aiic aika aiki aita aiti aitt akaa akai akca akia akik akka akki at-t ataa atab atac atai atak atat atca atcc atck atia atic atik atit atka atkt atta atti ba-i baaa baak baat baba babb babi bac- baca bacc baci back bact baia baib baic baik bait bak- baka baki bakt bata batc bati batt bbbb bbci bcaa bcat bcbc bcca bccc bcci bcia bcit bctc biak biat biba bibb bibi bica bicc bici bick bita bitc bitt btaa btcc bttb caaa caab caac caat caba cabi cac- caca cacc caci cack caia caib caic caik cait caka cat- cata catb catc cati catt cbac cbat cbbc cbca cbcc cbct cbia cbit cbka cbta cbtc ccaa ccab ccac ccai ccat ccba ccbc ccca cccb cccc ccci ccic ccii cctb cctc cctt ciaa ciak ciat ciba cibc cibi cica cicc cici cict ciia ciii ciit cika cita citb citi citt ckac ckat ckbc ckbi ckck cktb ctab ctba ctbi ctca ctia ctic ctta iaaa iaac iaai iaat iaba iaca iacc iact iaia iata iatc iati ibac ibat ibca ibia ibtb ibtc icaa icab icac icai icat icbc icca iccb iccc icci icct icta iiac iica iiii iiit iita iitt ikat ikki itaa itac itai itak itat itia itic itta k-ci kaaa kaab kaai kaak kaat kaba kabb kabc kabi kacb kacc kaci kact kaia kaib kaic kaii kaik kait kaka kakc kaki kakk kakt kat- kata katb katc kati katk katt kbaa kbab kbac kbai kbak kbat kbba kbbb kbbc kbbi kbbk kbbt kbca kbcb kbci kbck kbct kbia kbib kbic kbik kbit kbkb kbkk kbta kbtb kbtc kbtk kbtt kcaa kcab kcac kcai kcat kcba kcbc kcbi kcbk kcca kccb kccc kcci kcck kcct kcic kcii kcit kckc kckk kcta kctb kctc kcti kiab kiac kiai kiba kibb kibc kibi kibt kica kicb kicc kick kict kiia kiic kiii kiik kiit kika kikc kiki kikk kikt kita kitc kiti kitt kkaa kkac kkai kkat kkba kkbb kkbi kkbt kkcb kkci kkck kkct kkia kkic kkik kkit kkkk kktc kktk ktaa ktai ktak ktat ktba ktbb ktbc ktbt ktcc ktck ktia ktib ktic ktik ktkb ktkc ktkk ktkt kttc ktti kttk kttt taa- taat taba tabb tabc tabi taca tacc taci tack tact taia taik tait taka taki takk takt tata tatb tati tatt tbca tbcb tbcc tbit tbta tcca tccc tctc tiaa tiab tiba tibi tica ticc tick tiit tika tiki tita titc titi titt tkac ttab ttbb tttt