-ana a-ak aaaa aaab aaac aaan aaar aaas aaba aabb aabc aaca aacb aacc aack aacn aacr aacs aaka aana aara aarc aars aasa aasc aass abaa abab abac abak aban abar abas abb- abba abbb abbr abbs abca abcb abcc abcn abcr abcs abra abrc abrs abs- absa abss acaa acab acac acan acar acas acba acca accc accs acks acr- acra acrc acrr acrs acsa acsc acss akaa akan akar akas akca akka akna akr- akra aksa ana- anaa anab anac anak anan anar anas anba anbb anca ancc ank- anka anna annb anns anrc ansa arab arac arak aran arar aras arba arbs arc- arca arcs arka arks arna arnk arns arr- arra arrc arrk arrr arrs ars- arsa arsc arsk asaa asab asac asak asan asar asas asba asc- asca ascb ascc ascr aska askr asks asnc asra asrc asrs assa assc assk assn assr asss baaa baak baan baar baas baba babb babr babs bac- baca bacc back bacn bacs bak- baka bakr baks bana banc bank bann banr bans bar- bara barb barc bark barn barr bars basa basc bask bass bbas bbbb bbbs bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcra bcrs bcsa bcsc bcsn bcss bnas bnrr bnss brab brac brak bran bras brca brcb brka brkb brna brns brrr brrs brsb brsr bsaa bsac bsas bscs bsns bsra bssc caaa caab caac caan caas caba cabs cac- caca cacc cack cacr caka cana canc cank cann cans cara carb carc cark carn carr cars casa casb casc cask casr cass cbac cbar cbbc cbbs cbca cbcc cbcn cbcr cbcs cbka cbkn cbkr cbna cbrn cbsa cbsc cbsn ccaa ccab ccac ccar ccas ccba ccbc ccbn ccca cccb cccc cccs ccna ccnb ccnc ccnr ccns ccra ccrc ccrs ccsa ccsn ccss ckac ckan ckbc ckck ckcs cknb cknc ckns ckrc cksa cksb cnaa cnac cnas cnbc cnna cnrc cnrr cnsa cnss crab crac cran crar cras crbc crca crcc crcr crkc crna crns crsa crss csaa csab csac csak csar csas cscb cscc cscr cscs cska csks csra csrc csrs cssa cssr kaaa kaab kaak kaan kaar kaas kaba kabb kabc kabr kacb kacc kacs kaka kakc kakk kakn kaks kana kanb kann kans kara karb kark karn karr kars kas- kasa kasb kasc kask kasn kasr kass kbaa kbab kbac kbak kbar kbas kbba kbbb kbbc kbbk kbbr kbbs kbca kbcb kbck kbcr kbcs kbkb kbkk kbkr kbna kbnn kbnr kbra kbrb kbrc kbrk kbrn kbsa kbsb kbsk kbsn kbsr kbss kcaa kcab kcac kcar kcas kcba kcbc kcbk kcbr kcbs kcca kccb kccc kcck kccr kckc kckk kckn kckr kcnb kcnr kcns kcrc kcrn kcrr kcrs kcsa kcsb kcsc kcsn kcsr kcss kkaa kkac kkan kkar kkba kkbb kkbn kkbr kkbs kkcb kkck kkcn kkcr kkcs kkkk kknb kknn kkns kkrb kkrc kkrk kkrn kkrr kkrs kksa kksn kksr kkss knaa knab knac knan knar knas knba knbb knbc knbn knbr knca kncb knck kncn kncr knkk knnb knnk knnr knns knrb knrk knrs knsa knsb knsc knsk knsn knsr knss krab krac krak kran krar kras krba krbb krbk krbr krca krcb krcc krcn krcs krka krkc krkk krkn krkr krks krna krnb krnk krnn krrb krrc krrk krrn krrr krrs krsa krsc krsk krsn krsr krss ksab ksac ksak ksan ksar ksas ksba ksbc ksbn ksbr ksbs ksca kscb ksck kscn kscr kscs kska kskb kskk kskn kskr ksks ksna ksnb ksnc ksnk ksnn ksnr ksns ksra ksrb ksrn ksrr ksrs kssa kssn kssr ksss naaa naab naac naan naar naas naba nabc nabk nabs naca nacc nack nacs naka naks nan- nana nanb nann nans nara narc nark narn narr nars nas- nasa nasb nasc nask nasr nass nbaa nbak nbar nbas nbbc nbca nbcc nbcs ncaa ncac ncar ncba ncbc ncbs ncca nccc nccn nccr nccs ncna ncnc ncra ncrc ncsa ncsc ncss nnnn nnsa nnss nrab nras nrca nrcs nrna nrrc nrsa nrsc nsaa nsac nsar nsca nscc nscs nskk nsna nsnr nsra nsrc nssa nssb nssc nssr nsss raab raak raan raas raba rabb rabk rabs rac- raca racc rack racs raka rakk rana ranc rank rann rans rara rarb rark rars rasa rasc rask rass rbbb rbbr rbbs rbss rcac rcas rcbc rccb rccc rccs rcnr rcsa rcsc rcss rkss rnas rnbr rncs rras rrna rrrr rsaa rscc rscn rscs rsna rsnn rsnr rssa sa-c saab saac saak saan saar saas saba sabb sabc sabr sabs saca sacc sack sacn sacr sacs saka sakb sakk saks sana sank sann sanr sans sara sarc sark sarn sarr sars sasa sasc sask sass sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbrk sbsa scaa scab scac scak scan scar scas scba sccc sccs sck- scna scnr scr- scra scrc scrn scrs scsa scsc scsn scsr skab skac skan skar skn- skra skss snab snak snar snas snba snca sncc snns snra snrk snrs sras srbc srcc srna srnn ssaa ssab ssac ssan ssas ssbn ssbr ssca sscc sscs ssns ssra ssrc ssrs sssa sssb sssc ssss