-ana aaaa aaab aaac aaan aaap aaas aaba aabb aabc aabp aaca aacb aacc aacn aacp aacs aana aanp aapa aapc aaps aasa aasc aass abaa abab abac 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 acpa acps acsa acsc acss ana- anaa anab anac anan anap anas anba anbb anca ancc anna annb anns anp- anpa anpp ansa ansp apac apan apap apas apba apbs apca apcb apcc apcn apcs apna appa appc apps apsa apss asaa asab asac asan asap asas asba asc- asca ascb ascc ascp asnc aspa aspc asps assa assc assn assp asss baaa baan baas baba babb babs bac- baca bacc bacn bacs bana banc bann banp bans bapa bapc bapp baps basa basc bass bbas bbbb bbbs bcaa bcap bcas bcbc bcbp bcbs bcca bccc bccs bcpp bcps bcsa bcsc bcsn bcss 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 cana canc cann canp cans capa capb capc capn capp caps casa casb casc casp cass cbac cbbc cbbs cbca cbcc cbcn cbcp cbcs 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 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 csaa csab csac csas cscb cscc cscs csnp cspa cspb cspc csps cssa naaa naab naac naan naas naba nabc nabs naca nacc nacp nacs nan- nana nanb nann nanp nans napa napb napp naps nas- nasa nasb nasc nasp nass nbaa 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 nnnn nnsa nnss npac npap npas npca npcc nppa nppc npsa npss nsaa nsac nsca nscc nscs nsna nspc nsps nssa nssb nssc nssp nsss paan paap paas paba paca pacs pan- pana panc pann pans papa papb papp paps pasa pasc pasp pass pbac pban pbcc pbpa pbsa pbsp pcaa pcap pcas pcba pcbc pcbs pcca pccc pccs pcns pcpb pcpn pcpp pcps pcsa pnac pnas pnca 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 saan saap saas saba sabb sabc sabs saca sacc sacn sacs sana sann sans sapa sapp saps sasa sasc sass sbaa sbac sbas sbbs sbca sbcc sbcs sbsa sbsp scaa scab scac scan scap scas scba sccc sccp sccs scna scpa scpb scps scsa scsc scsn snab snap snas snba snca sncc sncp snns snpp sp-a spac 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