a-ak a-ii aaaa aaab aaac aaai aaba aabb aabc aabi aaca aacb aacc aaci aack aaib aaic aaii aaka abaa abab abac abai abak abb- abba abbb abbi abca abcb abcc abci abia abib abic abza acaa acab acac acai acba acca accc acci aci- acia acic aiai aiba aica aicc aiia aiib aiic aika aiki aiza aizi akaa akai akca akia akik akka akki aza- azab azai azaz azca azia aziz azki azza azzi ba-i baaa baak baaz baba babb babi bac- baca bacc baci back bacz baia baib baic baik bak- baka baki baza bazi bbbb bbci bcaa bcbc bcca bccc bcci bcia biak biba bibb bibi bica bicc bici bick bizz bzzz caaa caab caac caba cabi cac- caca cacc caci cack caia caib caic caik caka caza cbac cbbc cbca cbcc cbia cbka ccaa ccab ccac ccai ccba ccbc ccca cccb cccc ccci ccic ccii ciaa ciak ciba cibc cibi cica cicc cici ciia ciii cika ciza ckac ckbc ckbi ckck iaaa iaac iaai iaba iaca iacc iaia ibac ibca ibia icaa icab icac icai icbc icca iccb iccc icci iiac iica iiii ikki izak izba izia izki k-ci kaaa kaab kaai kaak kaba kabb kabc kabi kabz kacb kacc kaci kacz kaia kaib kaic kaii kaik kaiz kaka kakc kaki kakk kaza kazc kazi kazz kbaa kbab kbac kbai kbak kbaz kbba kbbb kbbc kbbi kbbk kbbz kbca kbcb kbci kbck kbcz kbia kbib kbic kbik kbiz kbkb kbkk kbkz kbzc kbzi kbzz kcaa kcab kcac kcai kcba kcbc kcbi kcbk kcca kccb kccc kcci kcck kcic kcii kckc kckk kckz kczz kiab kiac kiai kiba kibb kibc kibi kibz kica kicb kicc kick kiia kiic kiii kiik kika kikc kiki kikk kikz kizz kkaa kkac kkai kkba kkbb kkbi kkbz kkcb kkci kkck kkia kkic kkik kkkk kkzz kzaz kzbb kzbi kzbk kzbz kzia kziz kzkz kzza kzzb kzzi kzzk kzzz zaba zabi zaca zack zaia zaka zaki zakk zaza zazi zbik ziak ziaz ziba zica zick zika ziki ziza zizi zizz zzzz