-ana a-ak aaaa aaab aaac aaan aaba aabb aabc aaca aacb aacc aack aacn aaka aana abaa abab abac abak aban abb- abba abbb abca abcb abcc abcn abza acaa acab acac acan acba acca accc akaa akan akca akka akna ana- anaa anab anac anak anan anaz anba anbb anca ancc ank- anka anna annb anza aza- azab azan azaz azca azna azza baaa baak baan baaz baba babb bac- baca bacc back bacn bacz bak- baka bana banc bank bann banz baza bbbb bcaa bcbc bcca bccc bzzz caaa caab caac caan caba cac- caca cacc cack caka cana canc cank cann canz caza cbac cbbc cbca cbcc cbcn cbka cbkn cbna ccaa ccab ccac ccba ccbc ccbn ccca cccb cccc ccna ccnb ccnc ckac ckan ckbc ckck cknb cknc cnaa cnac cnbc cnna cnnz kaaa kaab kaak kaan kaba kabb kabc kabz kacb kacc kacz kaka kakc kakk kakn kana kanb kann kanz kaza kazc kazn kazz kbaa kbab kbac kbak kbaz kbba kbbb kbbc kbbk kbbz kbca kbcb kbck kbcz kbkb kbkk kbkz kbna kbnn kbzc kbzn kbzz kcaa kcab kcac kcba kcbc kcbk kcca kccb kccc kcck kckc kckk kckn kckz kcnb kcnz kczz kkaa kkac kkan kkba kkbb kkbn kkbz kkcb kkck kkcn kkkk kknb kknn kkzn kkzz knaa knab knac knan knaz knba knbb knbc knbn knbz knca kncb knck kncn knkk knnb knnk knnz knz knza knzz kzan kzaz kzbb kzbk kzbz kzkz kzna kznb kznc kznk kznn kzza kzzb kzzk kzzn kzzz naaa naab naac naan naba nabc nabk naca nacc nack naka nan- nana nanb nann naza nazz nbaa nbak nbbc nbca nbcc ncaa ncac ncba ncbc ncca nccc nccn ncna ncnc nnnn nzcc zaan zaba zaca zack zaka zakk zana zann zaza znak zzzz