-ana a-ak a-do a-ok aaaa aaab aaac aaad aaan aaba aabb aabc aabd aaca aacb aacc aacd aack aacn aaco aada aadc aaka aana aand aaon aaoo abaa abab abac abad abak aban abb- abba abbb abbo abca abcb abcc abcd abcn abda abdo aboa abob abod abok abon aboo acaa acab acac acad acan acba acca accc accd acco acda acdb acdc ackd acoa acod acon adaa adab adac adad adak adan adao adba adbc adcc adda addc addd addn addo adna adob adoc adod adok adon adoo akaa akan akao akca akdn akka akko akna akok akon ana- anaa anab anac anad anak anan anao anba anbb anbo anca ancc anco and- anda ando ank- anka anko anna annb anno ano- anoa anod anon aoba aoca aonb aono baaa baad baak baan baba babb babo bac- baca bacc back bacn baco bada badb badd bado bak- baka bako bana banc band bank bann bano baon bbad bbbb bbdd bbdo bcaa bcbc bcca bccc bcda bdbc bddc bdna bnoc boab boac boad boak boan boba bobb bobo boca bock boco boda bodb bodo boka bokn boko bona bonc bond bonk bonn bono boob booc bood book boon c-bo c-cd caaa caab caac caan caba cabo cac- caca cacc cack caco cada cadc cadd cado caka cana canc cand cank cann cano caod cbac cbbc cbca cbcc cbcn cbdb cbdc cbdn cbdo cbka cbkn cbko cbna cbnd ccaa ccab ccac ccad ccba ccbc ccbn ccca cccb cccc ccdc ccdn ccna ccnb ccnc ccob ccoc ccod cdaa cdac cdad cdba cdda cddb cdna cdnb cdnc cdon ckac ckan ckbc ckck ckco ckdo cknb cknc ckoa ckob ckoc ckoo cnaa cnac cnbc cnco cnda cndd cnna coad coak coan coba cobb cobo coca cock coco coda codd cok- coka coko con- cona conc cond conk conn cono coob cood cook coon d-bo d-na daab daad daan daba dabb dabo daca dada dado daka dako dana dand dank dann dano daon dbcc dcbc dcca dccb dccc dcdb dcon dddd ddoc dkba dkdc dnaa dnab dnac dnad dnan dnoc doab doak doan doba dobb doca dock doco dod- doda dodd dodo doka doko dona donc dond donk donn dono doob dood dook doon kaaa kaab kaak kaan kaba kabb kabc kabd kabo kacb kacc kacd kaco kad- kada kadd kado kaka kakc kakk kakn kako kana kanb kand kann kano kaoa kaoc kaok kaon kbaa kbab kbac kbad kbak kbba kbbb kbbc kbbd kbbk kbbo kbca kbcb kbck kbco kbdb kbdn kbdo kbkb kbkk kbko kbna kbnd kbnn kbno kboa kbob kboc kbod kbok kbon kboo kcaa kcab kcac kcad kcba kcbc kcbd kcbk kcca kccb kccc kccd kcck kcda kcdc kcdd kckc kckk kckn kcko kcnb kcnd kcno kcob kcon kdaa kdab kdac kdad kdak kdao kdbb kdbn kdca kdcc kdcd kdco kddb kddc kddd kddk kdka kdkb kdkd kdkk kdkn kdko kdna kdnd kdnk kdnn kdno kdoc kdok kkaa kkac kkan kkba kkbb kkbd kkbn kkbo kkcb kkcd kkck kkcn kkco kkda kkdc kkdd kkdo kkkk kknb kknd kknn kkno kkoa kkob kkon kkoo knaa knab knac knan knba knbb knbc knbn knca kncb knck kncn knco knda kndb kndc kndd kndk kndn kndo knkk knnb knnd knnk knob knoc knod knok knon koab koac koak koan koba kobb kobc kobk kobn kobo koca kocb kocd kock kocn koda kodk kodo koka kokb kokc kokk kokn koko kona konc kond konk kono koob kooc kook koon kooo naaa naab naac naad naan naba nabc nabk nabo naca nacc nacd nack naco nada nadc nadk naka nako nan- nana nanb nand nann nano naoc nbaa nbad nbak nbbc nbbo nbca nbcc nbco ncaa ncac ncba ncbc ncca nccc nccn ncda ncdc ncdn ncna ncnc ncnd ncoa ncoc ndaa ndak ndao ndcc nddb nddo ndna ndoc nkok nndb nnnn noaa noac noak noba nobc nobo nock noco noda nodo noko non- nona nonn nono noo- noob nook noon nooo obad obak oban obba obbo obkb obok obon ocab ocac ocad ocak ocan ocbc occa occc occn ocna ocon odac odbo odda oddd odnb odon odoo okak okan okka okko okna okno okok okon onab onan onc- onca oncd onco onda ondo onna onno onod onon ooaa ooak ooba ooda oona oooo