-ana a-ak aaaa aaab aaac aaan aaba aabb aabc aaca aacb aacc aack aacn aaka aana abaa abab abac abak aban abax abb- abba abbb abca abcb abcc abcn acaa acab acac acan acba acca accc akaa akan akca akka akna ana- anaa anab anac anak anan anax anba anbb anca ancc ank- anka anna annb axan ba-x baaa baak baan baba babb bac- baca bacc back bacn bak- baka bana banc bank bann bbbb bcaa bcbc bcca bccc caaa caab caac caan caba cac- caca cacc cack caka cana canc cank cann caxa cbac cbax cbbc cbca cbcc cbcn cbka cbkn cbna cbxa ccaa ccab ccac ccba ccbc ccbn ccca cccb cccc ccna ccnb ccnc ckac ckan ckbc ckbx ckck ckcx cknb cknc cknx cnaa cnac cnbc cnna cxxx kaaa kaab kaak kaan kaba kabb kabc kacb kacc kaka kakc kakk kakn kakx kana kanb kann kanx kaxa kbaa kbab kbac kbak kbba kbbb kbbc kbbk kbca kbcb kbck kbkb kbkk kbna kbnn kbxb kbxx kc-x kcaa kcab kcac kcba kcbc kcbk kcbx kcca kccb kccc kcck kckc kckk kckn kckx kcnb kkaa kkac kkan kkba kkbb kkbn kkcb kkck kkcn kkkk kknb kknn kknx kkxa kkxk kkxx knaa knab knac knan knax knba knbb knbc knbn knca kncb knck kncn knkk knnb knnk knxx kxaa kxac kxba kxbn kxbx kxca kxkc kxkk kxkx kxna kxnc kxxk kxxn kxxx naaa naab naac naan naba nabc nabk naca nacc nack naka nan- nana nanb nann nbaa nbak nbbc nbca nbcc ncaa ncac ncba ncbc ncca nccc nccn ncna ncnc nnnn xana xxxx