-ana a-ak aaaa aaab aaac aaan aaap aaas aaba aabb aabc aabp aaca aacb aacc aack aacn aacp aacs aaka aana aanp aapa aapc aaps aasa aasc aass abaa abab abac abak aban abap abas abb- abba abbb abbs abca abcb abcc abcn abcp abcs abpa abpc abpn abpp abps abs- absa absp abss acaa acab acac acan acap acas acba acca accc accp accs acks acpa acps acsa acsc acss akaa akan akap akas akca akka akna aksa ana- anaa anab anac anak anan anap anas anba anbb anca ancc ank- anka anna annb anns anp- anpa anpp ansa ansp apac apak apan apap apas apba apbs apca apcb apcc apcn apcs apna appa appc apps apsa apss asaa asab asac asak asan asap asas asba asc- asca ascb ascc ascp aska asks asnc aspa aspc asps assa assc assk assn assp asss baaa baak baan baas baba babb babs bac- baca bacc back bacn bacs bak- baka baks bana banc bank bann banp bans bapa bapc bapp baps basa basc bask bass bbas bbbb bbbs bcaa bcap bcas bcbc bcbp bcbs bcca bccc bccs bcpp bcps bcsa bcsc bcsn bcss bksp bnas bnpp bnss bpcp bpsa bsaa bsac bsap bsas bscp bscs bsns bspp bssc caaa caab caac caan caap caas caba cabs cac- caca cacc cack caka cana canc cank cann canp cans capa capb capc capn capp caps casa casb casc cask casp cass cbac cbbc cbbs cbca cbcc cbcn cbcp cbcs cbka cbkn cbna cbpc cbpp cbsa cbsc cbsn ccaa ccab ccac ccap ccas ccba ccbc ccbn ccca cccb cccc cccp cccs ccna ccnb ccnc ccnp ccns ccpa ccpn ccpp ccps ccsa ccsn ccsp ccss ckac ckan ckbc ckck ckcs cknb cknc ckns ckpc cksa cksb cnaa cnac cnap cnas cnbc cnbp cncp cnna cnpa cnsa cnss cpaa cpac cpan cpap cpas cpbc cpca cpcs cpnb cpns cppa cpps cpsa cpsc cpsk csaa csab csac csak csas cscb cscc cscs cska csks csnp cspa cspb cspc csps cssa kaaa kaab kaak kaan kaap kaas kaba kabb kabc kacb kacc kacp kacs kaka kakc kakk kakn kaks kana kanb kann kanp kans kap- kapa kapc kapn kapp kaps kas- kasa kasb kasc kask kasn kasp kass kbaa kbab kbac kbak kbap kbas kbba kbbb kbbc kbbk kbbs kbca kbcb kbck kbcs kbkb kbkk kbna kbnn kbnp kbpa kbpc kbpk kbpn kbps kbsa kbsb kbsk kbsn kbss kcaa kcab kcac kcap kcas kcba kcbc kcbk kcbs kcca kccb kccc kcck kckc kckk kckn kcnb kcnp kcns kcpa kcpc kcpn kcps kcsa kcsb kcsc kcsn kcsp kcss kkaa kkac kkan kkap kkba kkbb kkbn kkbs kkcb kkck kkcn kkcs kkkk kknb kknn kkns kkpc kkpk kkpn kkps kksa kksn kksp kkss knaa knab knac knan knap knas knba knbb knbc knbn knca kncb knck kncn knkk knnb knnk knns knpa knpb knpc knsa knsb knsc knsk knsn knsp knss kpac kpak kpan kpas kpba kpbb kpbs kpcc kpcs kpkk kpnc kpnp kpns kppc kppk kppp kpsc kpsp ksab ksac ksak ksan ksas ksba ksbc ksbn ksbp ksbs ksca kscb ksck kscn kscs kska kskb kskk kskn ksks ksna ksnb ksnc ksnk ksnn ksnp ksns kspa kspb kspc kspk kspn ksps kssa kssn ksss naaa naab naac naan naas naba nabc nabk nabs naca nacc nack nacp nacs naka naks nan- nana nanb nann nanp nans napa napb napp naps nas- nasa nasb nasc nask nasp nass nbaa nbak nbap nbas nbbc nbca nbcc nbcs nbpa nbpp nbps nbsp ncaa ncac ncap ncba ncbc ncbs ncca nccc nccn nccp nccs ncna ncnc ncpa ncpc ncsa ncsc ncss nkpa nksp nnnn nnsa nnss npac npap npas npca npcc nppa nppc npsa npss nsaa nsac nsca nscc nscs nskk nsna nspc nsps nssa nssb nssc nssp nsss paak paan paap paas paba paca pack pacs paka paks pan- pana panc pank pann pans papa papb papp paps pasa pasc pask pasp pass pbac pban pbcc pbpa pbpk pbsa pbsp pcaa pcap pcas pcba pcbc pcbs pcca pccc pccs pcks pcns pcpb pcpn pcpp pcps pcsa pkan pkcs pkna pnac pnas pnca pnkp pnpp pnsc ppac ppan ppap ppcc ppcs pppa pppn pppp ppps ppss psac psap psas psca psna psnc pspp psps pssa pssc sa-c saab saac saak saan saap saas saba sabb sabc sabs saca sacc sack sacn sacs saka sakb sakk saks sana sank sann sans sapa sapp saps sasa sasc sask sass sbaa sbac sbas sbbs sbca sbcc sbcs sbsa sbsp scaa scab scac scak scan scap scas scba sccc sccp sccs sck- scna scpa scpb scps scsa scsc scsn skab skac skan skap skn- skpc skss snab snak snap snas snba snca sncc sncp snns snpp sp-a spac spak span spap spas spca spcc spcs spns spps spsa spsp spss ssaa ssab ssac ssan ssap ssas ssbn ssca sscc sscp sscs ssns sspa sspc ssps sssa sssb sssc ssss