a-a a-b a-c aaa aab aac aag aak aan aar aas ab- aba abb abc abg abk abn abr abs ac- aca acb acc acg ack acn acr acs ag- aga agb agc agg agk agn agr ags aka akb akc akg akk akn akr aks an- ana anb anc ang ank ann anr ans ar- ara arb arc arg ark arn arr ars as- asa asb asc asg ask asn asr ass baa bab bac bag bak ban bar bas bba bbb bbc bbg bbk bbn bbr bbs bca bcb bcc bcg bck bcn bcr bcs bga bgb bgc bgg bgk bgn bgr bgs bka bkb bkc bkg bkk bkn bkr bks bna bnb bnc bng bnk bnn bnr bns bra brb brg brk brn brr brs bsa bsb bsc bsg bsk bsn bsr bss c-- caa cab cac cag cak can car cas cba cbb cbc cbg cbk cbn cbr cbs cca ccb ccc ccg cck ccn ccr ccs cga cgb cgc cgg cgn cgr cgs cka ckb ckc cks cn- cna cnb cnc cng cnn cnr cns cra crb crc crg crk crn crr crs csa csb csc csg csk csn csr css gaa gab gac gag gak gan gar gas gba gbc gbg gbk gbn gbr gbs gca gcb gcc gcg gck gcn gcr gcs gga ggb ggc ggg ggn ggr ggs gka gkb gkn gks gna gnb gnc gnn gnr gns gra grb grc grg grk grn grr grs gsa gsb gsc gsg gsk gsn gsr gss ka- kaa kab kac kag kak kan kar kas kba kbb kbc kbk kbn kbr kbs kca kcb kcc kcg kck kcn kcr kcs kga kgb kgc kgs kkb kkc kkk kkn kkr kks kn- kna knc kng knk knn knr kra krc krg krk krn krr krs ksa ksb ksc ksg ksk ksn ksr kss naa nab nac nag nak nan nar nas nba nbb nbc nbg nbk nbn nbr nbs nca ncb ncc ncg nck ncn ncr ncs nga ngb ngc ngg ngk ngn ngs nka nkc nkk nkn nkr nks nna nnb nnc nng nnk nnn nns nra nrb nrc nrg nrk nrn nrr nrs nsa nsb nsc nsg nsk nsn nsr nss ra- raa rab rac rag rak ran rar ras rba rbb rbc rbg rbk rbn rbr rbs rca rcb rcc rcg rcn rcr rcs rga rgb rgc rgg rgk rgn rgr rgs rkb rkc rkg rkk rks rna rnb rnc rng rnn rnr rns rra rrb rrc rrg rrk rrn rrr rrs rsa rsb rsc rsg rsk rsn rsr rss saa sab sac sag sak san sar sas sba sbb sbc sbg sbk sbn sbr sbs sca scb scc scg sck scn scr scs sga sgb sgc sgg sgk sgn sgr sgs sk- ska skb skc skg skk skr sks sna snb snc sng snk snn snr sns sr- sra srb src srg srk srn srr srs ss- ssa ssb ssc ssg ssk ssn ssr sss

-ana a-ak aaaa aaab aaac aaan aaar aaas aaba aabb aabc aaca aacb aacc aack aacn aacr aacs aaka aana aang aara aarc aars aasa aasc aass abaa abab abac abag abak aban abar abas abb- abba abbb abbr abbs abca abcb abcc abcn abcr abcs abra abrc abrs abs- absa abss acaa acab acac acag acan acar acas acba acca accc accs acga acgr acgs acks acr- acra acrc acrr acrs acsa acsc acss agac agag agan agar agas agba agca agcc agga agna agns agra agsa agsg akaa akan akar akas akca akka akna akr- akra aksa ana- anaa anab anac anag anak anan anar anas anba anbb anca ancc ang- anga angs ank- anka anna annb anns anrc ansa arab arac arag arak aran arar aras arba arbs arc- arca arcs arga argb args arka arks arna arng arnk arns arr- arra arrc arrg arrk arrr arrs ars- arsa arsc arsk asaa asab asac asag asak asan asar asas asba asc- asca ascb ascc ascr aska askr asks asnc asra asrc asrg asrs assa assc assk assn assr asss baaa baak baan baar baas baba babb babr babs bac- baca bacc back bacn bacs baga bagg bagn bags bak- baka bakr baks bana banc bang bank bann banr bans bar- bara barb barc barg bark barn barr bars basa basc bask bass bbas bbbb bbbs bbga bbng bbrc bbrg bcaa bcar bcas bcbc bcbg bcbs bcca bccc bccs bcgs bcra bcrs bcsa bcsc bcsn bcss bgan bgca bggs bnas bnrr bnss brab brac brag brak bran bras brca brcb brka brkb brna brns brrr brrs brsb brsr bsaa bsac bsas bscs bsgs bsns bsra bssc caaa caab caac caan caas caba cabg cabs cac- caca cacc cack cacr caga cagg cagn cagr cags caka cana canc cang 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 cbga cbgb cbka cbkg cbkn cbkr cbna cbrn cbsa cbsc cbsn ccaa ccab ccac ccag ccar ccas ccba ccbc ccbn ccca cccb cccc cccs ccga ccgc ccgs ccna ccnb ccnc ccnr ccns ccra ccrc ccrg ccrs ccsa ccsg ccsn ccss cgac cgas cgcc cgcg cggs cgns cgsb cgss ckac ckan ckbc ckck ckcs ckga ckgn cknb cknc ckns ckrc cksa cksb cnaa cnac cnag cnas cnbc cnna cnrc cnrr cnsa cnss crab crac crag cran crar cras crbc crca crcc crcr crgs crkc crna crns crsa crss csaa csab csac csak csar csas cscb cscc cscr cscs csgn cska csks csra csrc csrs cssa cssr gaar gaas gaba gabb gabr gabs gack gaga gagg gags gana ganc gang gank gann gans gara garb garg garn garr gars gasa gasb gasc gask gasr gass gbag gban gbas gbbs gc-c gcaa gcbc gccc gccs gcna gcrg gcss gggg ggrn ggss gnaa gnac gnar gnas gncc gngc gnrc gnrr grab grac gran gras grbr grcc grrr grrs grss gsab gskb kaaa kaab kaag kaak kaan kaar kaas kaba kabb kabc kabg kabr kacb kacc