a-a a-b a-c aaa aab aac aak aam aar aas ab- aba abb abc abk abm abr abs ac- aca acb acc ack acm acr acs aka akb akc akk akm akr aks ama amb amc amk amm amr ams ar- ara arb arc ark arm arr ars as- asa asb asc ask asm asr ass baa bab bac bak bam bar bas bba bbb bbc bbk bbm bbr bbs bca bcb bcc bck bcm bcr bcs bka bkb bkc bkk bkm bkr bks bma bmb bmc bmk bmm bmr bms bra brb brk brm brr brs bsa bsb bsc bsk bsm bsr bss c-- caa cab cac cak cam car cas cba cbb cbc cbk cbm cbr cbs cca ccb ccc cck ccm ccr ccs cka ckb ckc ckm cks cma cmb cmc cmk cmm cmr cms cra crb crc crk crm crr crs csa csb csc csk csm csr css ka- kaa kab kac kak kam kar kas kba kbb kbc kbk kbm kbr kbs kca kcb kcc kck kcm kcr kcs kkb kkc kkk kkm kkr kks kma kmb kmc kmk kmm kms kra krc krk krr krs ksa ksb ksc ksk ksm ksr kss m-r maa mab mac mak mam mar mas mba mbb mbc mbk mbm mbr mbs mc- mca mcb mcc mck mcm mcr mcs mka mkb mkc mkk mkm mkr mks mma mmb mmc mmk mmm mmr mms mra mrb mrc mrk mrm mrr mrs msa msb msc msk msm msr mss ra- raa rab rac rak ram rar ras rba rbb rbc rbk rbm rbr rbs rca rcb rcc rcm rcr rcs rkb rkc rkk rkm rks rma rmb rmc rmm rmr rms rra rrb rrc rrk rrm rrr rrs rsa rsb rsc rsk rsm rsr rss saa sab sac sak sam sar sas sba sbb sbc sbk sbm sbr sbs sca scb scc sck scm scr scs sk- ska skb skc skk skm skr sks sma smb smc smk smm smr sms sr- sra srb src srk srm srr srs ss- ssa ssb ssc ssk ssm ssr sss

a-ak aaaa aaab aaac aaam aaar aaas aaba aabb aabc aabm aaca aacb aacc aack aacm aacr aacs aaka aama aamb aamc aamr aams aara aarc aarm aars aasa aasc aasm aass abaa abab abac abak abam abar abas abb- abba abbb abbr abbs abca abcb abcc abcr abcs abma abmb abmc abms abra abrc abrs abs- absa abss acaa acab acac acar acas acba acca accc accm accs acks acma acmc acms acr- acra acrc acrm acrr acrs acsa acsc acsm acss akaa akam akar akas akca akka akr- akra aksa amaa amac amam amar amas amb- amba ambr ambs amca amcc amcs amka amm- amma amra amrc amsa amsc amss arab arac arak aram arar aras arba arbs arc- arca arcm arcs arka arks arma armc armm arms arr- arra arrc arrk arrr arrs ars- arsa arsc arsk asaa asab asac asak asam asar asas asba asbm asc- asca ascb ascc ascr aska askr asks asma asmm asmr asms asra asrc asrm asrs assa assc assk assr asss baaa baak baam baar baas baba babb babm babr babs bac- baca bacc back bacs bak- baka bakr baks bama bamb bamc bamm bams bar- bara barb barc bark barm barr bars basa basc bask bass bbas bbbb bbbs bbcm bbrc bcaa bcam bcar bcas bcbc bcbs bcca bccc bccm bccs bcma bcms bcra bcrs bcsa bcsc bcsm bcss bmaa brab brac brak bram bras brca brcb brka brkb brmc brrm brrr brrs brsb brsr bsaa bsac bsam bsas bscs bsms bsra bsrm bssc bssm caaa caab caac caam caas caba cabs cac- caca cacc cack cacm cacr caka cama camb camc camk camm cams cara carb carc cark carm carr cars casa casb casc cask casm casr cass cbac cbar cbbc cbbs cbca cbcc cbcm cbcr cbcs cbka cbkm cbkr cbms cbrm cbsa cbsc cbsm ccaa ccab ccac ccam ccar ccas ccba ccbc ccca cccb cccc cccm cccs cckm ccma ccmb ccmc ccmm ccms ccra ccrc ccrs ccsa ccss ckac ckbc ckck ckcm ckcs ckrc ckrm cksa cksb cmaa cmac cmas cmba cmbc cmbs cmcc cmcs cmmb cmmc cmms cmra cmrr cmrs cmsa cmsc crab crac cram crar cras crbc crca crcc crcr crkc crmb crms crsa crss csaa csab csac csak csar csas csbm cscb cscc cscr cscs cska csks csma csmc csra csrc csrs cssa cssm cssr kaaa kaab kaak kaam kaar kaas kaba kabb kabc kabr kacb kacc kacs kaka kakc kakk kakm kaks kam- kama kamb kamc kamm kamr kams kara karb kark karm karr kars kas- kasa kasb kasc kask kasm kasr kass kbaa kbab kbac kbak kbam kbar kbas kbba kbbb kbbc kbbk kbbm kbbr kbbs kbca kbcb kbck kbcr kbcs kbkb kbkk kbkr kbmb kbmc kbmr kbms kbra kbrb kbrc kbrk kbsa kbsb kbsk kbsm kbsr kbss kcaa kcab kcac kcam kcar kcas kcba kcbc kcbk kcbr kcbs kcca kccb kccc kcck kccr kckc kckk kckm kckr kcmb kcmc kcmk kcmm kcmr kcms kcrc kcrr kcrs kcsa kcsb kcsc kcsm kcsr kcss kkaa kkac kkam kkar kkba kkbb kkbr kkbs kkcb kkck kkcm kkcr kkcs kkkk kkma kkmc kkmk kkmr kkms kkrb kkrc kkrk kkrr kkrs kksa kksm kksr kkss kmac kmak kmam kmas kmbc kmbr kmbs kmca kmcb kmcc kmcm kmcr kmcs kmkk kmks kmmk kmmm kmmr kmms kmrb kmrc kmrr kmrs kmsa kmsb kmsc kmsr kmss krab krac krak kram krar kras krba krbb krbk krbm krbr krca krcb krcc krcm krcs krka krkc krkk krkr krks krma krmb krmc krmr krms krrb krrc krrk krrm krrr krrs krsa krsc krsk krsr krss ksab ksac ksak ksam ksar ksas ksba ksbc ksbr ksbs ksca kscb ksck kscm kscr kscs kska kskb kskk kskr ksks ksma ksmb ksmc ksmm ksmr ksms ksra ksrb ksrm ksrr ksrs kssa kssm kssr ksss maaa maac maak maam maar maas maba mabs mac- maca macb macc mack macr macs maka maks mama mamc mams mar- mara marc mark