a-a a-b a-c aaa aab aac aak aan aao aas ab- aba abb abc abk abn abo abs ac- aca acb acc ack acn aco acs aka akb akc akk akn ako aks an- ana anb anc ank ann ano ans aoa aob aoc aok aon aoo aos as- asa asb asc ask asn aso ass baa bab bac bak ban bao bas bba bbb bbc bbk bbn bbo bbs bca bcb bcc bck bcn bco bcs bka bkb bkc bkk bkn bko bks bna bnb bnc bnk bnn bno bns boa bob boc bok bon boo bos bsa bsb bsc bsk bsn bso bss c-- caa cab cac cak can cao cas cba cbb cbc cbk cbn cbo cbs cca ccb ccc cck ccn cco ccs cka ckb ckc cko cks cn- cna cnb cnc cnn cno cns co- coa cob coc cok con coo cos csa csb csc csk csn cso css ka- kaa kab kac kak kan kao kas kba kbb kbc kbk kbn kbo kbs kca kcb kcc kck kcn kcs kkb kkc kkk kkn kks kn- kna knc knk knn kno koa kob koc kok kon koo kos ksa ksb ksc ksk ksn kso kss naa nab nac nak nan nao nas nba nbb nbc nbk nbn nbo nbs nca ncb ncc nck ncn nco ncs nka nkc nkk nkn nko nks nna nnb nnc nnk nnn nno nns no- noa nob noc nok non noo nos nsa nsb nsc nsk nsn nso nss oaa oab oac oak oan oao oas ob- oba obb obc obk obn obo obs oc- oca ocb occ ock ocn oco ocs oka okb okc okk oko oks on- ona onb onc onk onn ono ons oo- ooa oob ooc ook oon ooo oos os- osa osb osc osk osn oso oss saa sab sac sak san sao sas sba sbb sbc sbk sbn sbo sbs sca scb scc sck scn sco scs sk- ska skb skc skk sko sks sna snb snc snk snn sno sns soa sob soc sok son soo sos ss- ssa ssb ssc ssk ssn sso sss

-ana a-ak a-ok aaaa aaab aaac aaan aaas aaba aabb aabc aaca aacb aacc aack aacn aaco aacs aaka aana aaon aaoo aasa aasc aass abaa abab abac abak aban abas abb- abba abbb abbo abbs abca abcb abcc abcn abcs aboa abob abok abon aboo abos abs- absa abss acaa acab acac acan acas acba acca accc acco accs acks acoa acon acos acsa acsc acss akaa akan akao akas akca akka akko akna akok akon akos aksa ana- anaa anab anac anak anan anao anas anba anbb anbo anca ancc anco ank- anka anko anna annb anno anns ano- anoa anon anos ansa anso aoba aoca aocs aoks aonb aono aoss asaa asab asac asak asan asao asas asba asbo asc- asca ascb ascc asco aska asko asks asnc asno asob asoc asok ason asos assa assc assk assn asso asss baaa baak baan baas baba babb babo babs bac- baca bacc back bacn baco bacs bak- baka bako baks bana banc bank bann bano bans baon baos basa basc bask baso bass bbas bbbb bbbs bcaa bcas bcbc bcbs bcca bccc bccs bcos bcsa bcsc bcsn bcss bnas bnoc bnss boab boac boak boan boas boba bobb bobo bobs boca bock boco bocs boka bokn boko boks bona bonc bonk bonn bono bons boob booc book boon boos bosa bosc bosk bosn boso boss bsaa bsac bsas bscs bsns bson bsos bssc c-bo caaa caab caac caan caas caba cabo cabs cac- caca cacc cack caco caka cana canc cank cann cano cans caos casa casb casc cask caso cass cbac cbbc cbbs cbca cbcc cbcn cbcs cbka cbkn cbko cbna cbsa cbsc cbsn ccaa ccab ccac ccas ccba ccbc ccbn ccca cccb cccc cccs ccna ccnb ccnc ccns ccob ccoc ccsa ccsn ccss ckac ckan ckbc ckck ckco ckcs cknb cknc ckns ckoa ckob ckoc ckoo ckos cksa cksb ckso cnaa cnac cnas cnbc cnco cnna cnsa cnss coak coan coas coba cobb cobo cobs coca cock coco cok- coka coko con- cona conc conk conn cono cons coob cook coon coos cosa cosc coso coss csaa csab csac csak csao csas cscb cscc csco cscs cska csks csob csos cssa k-os kaaa kaab kaak kaan kaas kaba kabb kabc kabo kacb kacc kaco kacs kaka kakc kakk kakn kako kaks kana kanb kann kano kans kaoa kaoc kaok kaon kaos kas- kasa kasb kasc kask kasn kaso kass kbaa kbab kbac kbak kbas kbba kbbb kbbc kbbk kbbo kbbs kbca kbcb kbck kbco kbcs kbkb kbkk kbko kbna kbnn kbno kboa kbob kboc kbok kbon kboo kbos kbsa kbsb kbsk kbsn kbso kbss kcaa kcab kcac kcas kcba kcbc kcbk kcbs kcca kccb kccc kcck kckc kckk kckn kcko kcnb kcno kcns kcob kcon kcos kcsa kcsb kcsc kcsn kcss kkaa kkac kkan kkba kkbb kkbn kkbo kkbs kkcb kkck kkcn kkco kkcs kkkk kknb kknn kkno kkns kkoa kkob kkon kkoo kksa kksn kkss knaa knab knac knan knas knba knbb knbc knbn knca kncb knck kncn knco knkk knnb knnk knns knob knoc knok knon knsa knsb knsc knsk knsn knso knss koab koac koak koan koas koba kobb kobc kobk kobn kobo kobs koca kocb kock kocn kocs koka kokb kokc kokk kokn koko koks kona konc konk kono koob kooc kook koon kooo koos kos- kosa kosb kosc koso koss ksab ksac ksak ksan ksas ksba ksbc ksbn ksbs ksca kscb ksck kscn ksco kscs kska kskb kskk kskn ksko ksks ksna ksnb ksnc ksnk ksnn ksns ksob ksoc ksok kson ksoo ksos kssa kssn ksso ksss naaa naab naac naan naas naba nabc nabk nabo nabs naca nacc nack naco nacs naka nako naks nan- nana nanb nann nano nans naoc naos nas- nasa nasb nasc nask naso nass nbaa nbak nbas nbbc nbbo nbca nbcc nbco nbcs ncaa ncac ncba ncbc ncbs ncca nccc nccn nccs ncna