-ana a-ak a-ok aaaa aaab aaac aaan aaba aabb aabc aaca aacb aacc aack aacn aaco aaka aana aaon aaoo abaa abab abac abak aban abb- abba abbb abbo abca abcb abcc abcn aboa abob abok abon aboo acaa acab acac acan acba acca accc acco acoa acon akaa akan akao akca akka akko akna akok akon ana- anaa anab anac anak anan anao anba anbb anbo anca ancc anco ank- anka anko anna annb anno ano- anoa anon aoba aoca aonb aono baaa baak baan baba babb babo bac- baca bacc back bacn baco bak- baka bako bana banc bank bann bano baon bbbb bcaa bcbc bcca bccc bnoc boab boac boak boan boba bobb bobo boca bock boco boka bokn boko bona bonc bonk bonn bono boob booc book boon c-bo caaa caab caac caan caba cabo cac- caca cacc cack caco caka cana canc cank cann cano cbac cbbc cbca cbcc cbcn cbka cbkn cbko cbna ccaa ccab ccac ccba ccbc ccbn ccca cccb cccc ccna ccnb ccnc ccob ccoc ckac ckan ckbc ckck ckco cknb cknc ckoa ckob ckoc ckoo cnaa cnac cnbc cnco cnna coak coan coba cobb cobo coca cock coco cok- coka coko con- cona conc conk conn cono coob cook coon kaaa kaab kaak kaan kaba kabb kabc kabo kacb kacc kaco kaka kakc kakk kakn kako kana kanb kann kano kaoa kaoc kaok kaon kbaa kbab kbac kbak kbba kbbb kbbc kbbk kbbo kbca kbcb kbck kbco kbkb kbkk kbko kbna kbnn kbno kboa kbob kboc kbok kbon kboo kcaa kcab kcac kcba kcbc kcbk kcca kccb kccc kcck kckc kckk kckn kcko kcnb kcno kcob kcon kkaa kkac kkan kkba kkbb kkbn kkbo kkcb kkck kkcn kkco kkkk kknb kknn kkno kkoa kkob kkon kkoo knaa knab knac knan knba knbb knbc knbn knca kncb knck kncn knco knkk knnb knnk knob knoc knok knon koab koac koak koan koba kobb kobc kobk kobn kobo koca kocb kock kocn koka kokb kokc kokk kokn koko kona konc konk kono koob kooc kook koon kooo naaa naab naac naan naba nabc nabk nabo naca nacc nack naco naka nako nan- nana nanb nann nano naoc nbaa nbak nbbc nbbo nbca nbcc nbco ncaa ncac ncba ncbc ncca nccc nccn ncna ncnc ncoa ncoc nkok nnnn noaa noac noak noba nobc nobo nock noco noko non- nona nonn nono noo- noob nook noon nooo obak oban obba obbo obkb obok obon ocab ocac ocak ocan ocbc occa occc occn ocna ocon okak okan okka okko okna okno okok okon onab onan onc- onca onco onna onno onon ooaa ooak ooba oona oooo