-ana a-fu a-un aaaa aaab aaac aaaf aaan aaas aaba aabb aabc aaca aacb aacc aacf aacn aacs aacu aafa aafb aafc aaff aana aasa aasc aasf aass aasu aaus abaa abab abac abaf aban abas abau abb- abba abbb abbs abca abcb abcc abcf abcn abcs abff abnu abs- absa absf abss absu abua abuf abun abus acaa acab acac acan acas acba acca accc accf accs accu acfc acfs acsa acsc acss acu- acuf acus afaa afan afbs afca afcb afcc afcs afcu affa affc affs afsa afsb afsc afua afus ana- anaa anab anac anan anas anau anba anbb anbu anca ancc anfa anna annb anns ansa ansf ansu anua anub anuf anun anus asaa asab asac asaf asan asas asau asba asbu asc- asca ascb ascc asfa asnc assa assc assn asss assu asub asun asus auaa auca aufc aufs auna ausa ausu baaa baaf baan baas baba babb babs babu bac- baca bacc bacn bacs bafc baff bana banc bann bans banu basa basc basf bass basu bau- bauf bbas bbau bbbb bbbs bbfc bbfn bcaa bcas bcbc bcbs bcca bccc bccs bcfc bcnu bcsa bcsc bcsn bcss bcuc bfas bfca bfcs bffs bnas bnss bsaa bsac bsas bscs bsfa bsfc bsff bsfs bsns bssc buba bubb bubs bubu buca bucc bucs bucu bufc buff buna bunb bunn buns bunu busa busc buss busu buus caaa caab caac caaf caan caas caba cabf cabs cabu cac- caca cacc cafa cafb cafc caff cafs cafu cana canc cann cans casa casb casc cass casu cauc cauf caus cbac cbbc cbbs cbca cbcc cbcn cbcs cbcu cbfb cbfc cbna cbsa cbsc cbsn cbus ccaa ccab ccac ccaf ccas ccba ccbc ccbn ccca cccb cccc cccf cccs cccu ccfa ccfc ccff ccna ccnb ccnc ccnf ccns ccnu ccsa ccsf ccsn ccss ccuc ccus cfaa cfab cfac cfbc cfbn cfbs cfca cfcb cfcf cfcn cfcs cffb cfnb cfns cfsa cfun cnaa cnac cnas cnbc cnfa cnna cnsa cnss csaa csab csac csas csbf cscb cscc cscf cscs csfc cssa csua csuf csus cuan cuau cub- cuba cubb cubs cuca cucc cucn cufa cufc cuff cuna cusa cusb cuss cusu faaa faac faan faas faba fabs fabu faca facc facs fafa fafc faff fana fanc fans fanu fasa fasc fasn fass faun fbus fcab fcas fcba fcbs fcca fccf fcsc ffcc ffff ffsa ffss ffun fnac fnuf fsas fscb fscc fssa fssc fssf fubb fubs fubu fuc- fuca fufc fuff fufu funa funf funs fusa fusc fuss fusu naaa naab naac naan naas naba nabc nabf nabs nabu naca nacc nacf nacs nafa nafc naff nafs nan- nana nanb nann nans nanu nas- nasa nasb nasc nasf nass nasu naus nbaa nbaf nbas nbbc nbca nbcc nbcs nbfa nbfc nbuf ncaa ncac ncba ncbc ncbs ncca nccc nccf nccn nccs nccu ncfc ncna ncnc ncsa ncsc ncsf ncss ncua nfaa nfas nfcu nfff nfsu nnnn nnsa nnss nsaa nsac nsca nscc nscs nsfc nsfs nsna nssa nssb nssc nssf nsss nsub nuan nuba nubc nubs nuca nucs nucu nuff nuna nunc nunn nuns nuss nusu sa-c saab saac saaf saan saas saba sabb sabc sabs sabu saca sacc sacn sacs sacu safa safb safc saff safu sana sann sans sanu sasa sasc sasf sass saua sauc sauf saun saus sbaa sbac sbas sbbs sbca sbcc sbcs sbfc sbsa sbus scaa scab scac scaf scan scas scba sccc sccs scfa scfc scna scsa scsc scsn scsu scua scub scun sfas sfba sfbc sfca sfcc sfcs sffc sfnb sfss sfsu snab snas snba snca sncc sncf snfu snns snub snus ssaa ssab ssac ssan ssas ssau ssbn ssca sscc sscs ssfc ssns sssa sssb sssc sssf ssss suan suas sub- suba subb subs suc- succ sucs suf- sufa sufc suff sufs sufu sun- suna sunb sunn suns sunu sus- susa suss susu suus uabc uaca uafa uasa uaua ubac ubba ucan ucas ucbc ucca ucfa ucfb ucsa ucsb ucsc ucsf ucsu ucua ufcu uffa unaa unac unan unas unau unca uncc uncf uncs unna unns uns- unsa unsc unus us-a usaa usac usaf usan usas usba usbc usbs usca uscc uscf uscs usfa usfc usfs usna usnc usnu ussa ussb ussc ussf usss ussu usua usun usus uuuu