-ana a-un aaaa aaab aaac aaan aaar aaas aaba aabb aabc aaca aacb aacc aacn aacr aacs aacu aana aara aarc aars aaru aasa aasc aass aasu aaus abaa abab abac aban abar abas abau abb- abba abbb abbr abbs abca abcb abcc abcn abcr abcs abnu abra abrc abrs abs- absa abss absu abua abun abus acaa acab acac acan acar acas acba acca accc accs accu acr- acra acrc acrr acrs acsa acsc acss acu- acur acus ana- anaa anab anac anan anar anas anau anba anbb anbu anca ancc anna annb anns anrc ansa ansu anua anub anun anus arab arac aran arar aras arau arba arbs arc- arca arcs arna arns arr- arra arrc arrr arrs arru ars- arsa arsc arsu arua arub arun asaa asab asac asan asar asas asau asba asbu asc- asca ascb ascc ascr asnc asra asrc asrs asru assa assc assn assr asss assu asub asun asur asus auaa auca auna aur- aura ausa ausu baaa baan baar baas baba babb babr babs babu bac- baca bacc bacn bacs bana banc bann banr bans banu bar- bara barb barc barn barr bars baru basa basc bass basu bau- baur bbas bbau bbbb bbbs bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcnu bcra bcrs bcru bcsa bcsc bcsn bcss bcuc bnas bnrr bnss brab brac bran bras brau brca brcb brna brns brrr brrs brsb brsr bruc brun brus bsaa bsac bsas bscs bsns bsra bssc buar buba bubb bubs bubu buca bucc bucs bucu buna bunb bunn buns bunu bur- bura burb burn burr burs buru busa busc buss busu buus caaa caab caac caan caas caba cabs cabu cac- caca cacc cacr cana canc cann cans cara carb carc carn carr cars casa casb casc casr cass casu cauc caus cbac cbar cbbc cbbs cbca cbcc cbcn cbcr cbcs cbcu cbna cbrn cbsa cbsc cbsn cbus ccaa ccab ccac ccar ccas ccba ccbc ccbn ccca cccb cccc cccs cccu ccna ccnb ccnc ccnr ccns ccnu ccra ccrc ccrs ccsa ccsn ccss ccuc ccus cnaa cnac cnas cnbc cnna cnrc cnrr cnsa cnss crab crac cran crar cras crau crbc crbu crca crcc crcr crna crns crsa crss crub crun crus csaa csab csac csar csas cscb cscc cscr cscs csra csrc csrs cssa cssr csua csur csus cuan cuau cub- cuba cubb cubs cuca cucc cucn cuna cura curb curn curr curs cusa cusb cuss cusu naaa naab naac naan naar naas naba nabc nabs nabu naca nacc nacs nan- nana nanb nann nans nanu nara narc narn narr nars naru nas- nasa nasb nasc nasr nass nasu naur naus nbaa nbar nbas nbbc nbca nbcc nbcs ncaa ncac ncar ncba ncbc ncbs ncca nccc nccn nccr nccs nccu ncna ncnc ncra ncrc ncsa ncsc ncss ncua nnnn nnsa nnss nrab nras nrca nrcs nrna nrrc nrsa nrsc nsaa nsac nsar nsca nscc nscs nsna nsnr nsra nsrc nssa nssb nssc nssr nsss nsub nuan nuba nubc nubs nuca nucs nucu nuna nunc nunn nuns nura nurc nurn nurr nurs nuru nuss nusu raab raan raas raba rabb rabs rabu rac- raca racc racs racu rana ranc rann rans rara rarb rars rasa rasc rass rasu raua raub rauc raun raus rbbb rbbr rbbs rbss rcac rcas rcbc rccb rccc rccs rcnr rcsa rcsc rcss rnas rnbr rncs rras rrna rrrr rrun rsaa rscc rscn rscs rsna rsnn rsnr rssa rsua ruan ruas ruba rubb rubs rubu ruca runa runc runn runs rura rurc rurs ruru rusa russ rusu ruun sa-c saab saac saan saar saas saba sabb sabc sabr sabs sabu saca sacc sacn sacr sacs sacu sana sann sanr sans sanu sara sarc sarn sarr sars saru sasa sasc sass saua sauc saun saur saus sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbsa sbus scaa scab scac scan scar scas scba sccc sccs scna scnr scr- scra scrc scrn scrs scsa scsc scsn scsr scsu scua scub scun scur snab snar snas snba snca sncc snns snra snrs snub snur snus sras srbc srcc srna srnn srub ssaa ssab ssac ssan ssas ssau ssbn ssbr ssca sscc sscs ssns ssra ssrc ssrs sssa sssb sssc ssss suan suar suas sub- suba subb subs suc- succ sucr sucs sun- suna sunb sunn suns sunu sur- sura surc surn surr surs suru sus- susa suss susu suus uabc uaca uarc uars uaru uasa uaua ubac ubar ubba ubra ucan ucar ucas ucbc ucca ucrc ucsa ucsb ucsc ucsu ucua unaa unac unan unar unas unau unca uncc uncs unna unns unra unrs uns- unsa unsc unus urac uran uras urau urba urbs urca urna urns urra ursa urss ursu urun urur urus us-a usaa usac usan usar usas usba usbc usbr usbs usca uscc uscs usna usnc usnr usnu usra ussa ussb ussc ussr usss ussu usua usun usus uuuu