a-a a-b a-c aaa aab aac aak aam aao aas ab- aba abb abc abk abm abo abs ac- aca acb acc ack acm aco acs aka akb akc akk akm ako aks ama amb amc amk amm amo ams aoa aob aoc aok aom aoo aos as- asa asb asc ask asm aso ass baa bab bac bak bam bao bas bba bbb bbc bbk bbm bbo bbs bca bcb bcc bck bcm bco bcs bka bkb bkc bkk bkm bko bks bma bmb bmc bmk bmm bmo bms boa bob boc bok bom boo bos bsa bsb bsc bsk bsm bso bss c-- caa cab cac cak cam cao cas cba cbb cbc cbk cbm cbo cbs cca ccb ccc cck ccm cco ccs cka ckb ckc ckm cko cks cma cmb cmc cmk cmm cmo cms co- coa cob coc cok com coo cos csa csb csc csk csm cso css ka- kaa kab kac kak kam kao kas kba kbb kbc kbk kbm kbo kbs kca kcb kcc kck kcm kcs kkb kkc kkk kkm kks kma kmb kmc kmk kmm kmo kms koa kob koc kok kom koo kos ksa ksb ksc ksk ksm kso kss m-o maa mab mac mak mam mao mas mba mbb mbc mbk mbm mbo mbs mc- mca mcb mcc mck mcm mco mcs mka mkb mkc mkk mkm mko mks mma mmb mmc mmk mmm mmo mms moa mob moc mok mom moo mos msa msb msc msk msm mso mss oaa oab oac oak oam oao oas ob- oba obb obc obk obm obo obs oc- oca ocb occ ock ocm oco ocs oka okb okc okk oko oks om- oma omb omc omm omo oms oo- ooa oob ooc ook oom ooo oos os- osa osb osc osk osm oso oss saa sab sac sak sam sao sas sba sbb sbc sbk sbm sbo sbs sca scb scc sck scm sco scs sk- ska skb skc skk skm sko sks sma smb smc smk smm smo sms soa sob soc sok som soo sos ss- ssa ssb ssc ssk ssm sso sss

a-ak a-ok aaaa aaab aaac aaam aaas aaba aabb aabc aabm aaca aacb aacc aack aacm aaco aacs aaka aama aamb aamc aamo aams aaoo aasa aasc aasm aass abaa abab abac abak abam abas abb- abba abbb abbo abbs abca abcb abcc abcs abma abmb abmc abms aboa abob abok aboo abos abs- absa abss acaa acab acac acas acba acca accc accm acco accs acks acma acmc acms acoa acom acos acsa acsc acsm acss akaa akam akao akas akca akka akko akok akom akos aksa amaa amac amam amas amb- amba ambo ambs amca amcc amco amcs amka amm- amma ammo amob amoc amok amoo amos amsa amsc amso amss aoba aoca aocs aoks aoma aoss asaa asab asac asak asam asao asas asba asbm asbo asc- asca ascb ascc asco aska asko asks asma asmm asms asob asoc asok asom asos assa assc assk asso asss baaa baak baam baas baba babb babm babo babs bac- baca bacc back baco bacs bak- baka bako baks bama bamb bamc bamm bams baos basa basc bask baso bass bbas bbbb bbbs bbcm bcaa bcam bcas bcbc bcbs bcca bccc bccm bccs bcma bcms bcos bcsa bcsc bcsm bcss bmaa bmoc boab boac boak boas boba bobb bobo bobs boca bock bocm boco bocs boka boko boks boma bomb boms boob booc book boom boos bosa bosc bosk bosm boso boss bsaa bsac bsam bsas bscs bsms bsos bssc bssm c-bo caaa caab caac caam caas caba cabo cabs cac- caca cacc cack cacm caco caka cama camb camc camk camm camo cams caos casa casb casc cask casm caso cass cbac cbbc cbbs cbca cbcc cbcm cbcs cbka cbkm cbko cbms cbsa cbsc cbsm ccaa ccab ccac ccam ccas ccba ccbc ccca cccb cccc cccm cccs cckm ccma ccmb ccmc ccmm ccms ccob ccoc ccom ccsa ccss ckac ckbc ckck ckcm ckco ckcs ckmo ckoa ckob ckoc ckom ckoo ckos cksa cksb ckso cmaa cmac cmas cmba cmbc cmbs cmcc cmcs cmmb cmmc cmms cmoc cmos cmsa cmsc coak coas coba cobb cobo cobs coca cock coco cok- coka coko com- coma comb comc comm como coms coob cook coom coos cosa cosc cosm coso coss csaa csab csac csak csao csas csbm cscb cscc csco cscs cska csks csma csmc csob csom csos cssa cssm k-os kaaa kaab kaak kaam kaas kaba kabb kabc kabo kacb kacc kaco kacs kaka kakc kakk kakm kako kaks kam- kama kamb kamc kamm kamo kams kaoa kaoc kaok kaos kas- kasa kasb kasc kask kasm kaso kass kbaa kbab kbac kbak kbam kbas kbba kbbb kbbc kbbk kbbm kbbo kbbs kbca kbcb kbck kbco kbcs kbkb kbkk kbko kbmb kbmc kbmo kbms kboa kbob kboc kbok kboo kbos kbsa kbsb kbsk kbsm kbso kbss kcaa kcab kcac kcam kcas kcba kcbc kcbk kcbs kcca kccb kccc kcck kckc kckk kckm kcko kcmb kcmc kcmk kcmm kcmo kcms kcob kcom kcos kcsa kcsb kcsc kcsm kcss kkaa kkac kkam kkba kkbb kkbo kkbs kkcb kkck kkcm kkco kkcs kkkk kkma kkmc kkmk kkmo kkms kkoa kkob kkoo kksa kksm kkss kmac kmak kmam kmas kmbc kmbs kmca kmcb kmcc kmcm kmco kmcs kmkk kmko kmks kmmk kmmm kmmo kmms kmoa kmob kmoc kmok kmom kmsa kmsb kmsc kmso kmss koab koac koak koas koba kobb kobc kobk kobo kobs koca kocb kock kocm kocs koka kokb kokc kokk koko koks koma komb komc komo koms koob kooc kook kooo koos kos- kosa kosb kosc koso koss ksab ksac ksak ksam ksas ksba ksbc ksbs ksca kscb ksck kscm ksco kscs kska kskb kskk ksko ksks ksma ksmb ksmc ksmm ksmo ksms ksob ksoc ksok ksom ksoo ksos kssa kssm ksso ksss maaa maac maak maam maas maba mabo mabs mac- maca macb macc mack maco macs maka mako maks mama mamc mamo mams maoc maos masa