-al a-a a-b a-c aaa aab aac aak aal aam aas ab- aba abb abc abk abl abm abs ac- aca acb acc ack acl acm acs aka akb akc akk akl akm aks al- ala alb alc alk all alm als ama amb amc amk aml amm ams as- asa asb asc ask asl asm ass baa bab bac bak bal bam bas bba bbb bbc bbk bbl bbm bbs bca bcb bcc bck bcl bcm bcs bka bkb bkc bkk bkl bkm bks bla blb blc blk bll blm bls bma bmb bmc bmk bml bmm bms bsa bsb bsc bsk bsl bsm bss c-- caa cab cac cak cal cam cas cba cbb cbc cbk cbl cbm cbs cca ccb ccc cck ccl ccm ccs cka ckb ckc ckm cks cl- cla clb clc clk cll clm cls cma cmb cmc cmk cml cmm cms csa csb csc csk csl csm css ka- kaa kab kac kak kal kam kas kba kbb kbc kbk kbl kbm kbs kca kcb kcc kck kcl kcm kcs kkb kkc kkk kkl kkm kks kl- kla klb klc klm kls kma kmb kmc kmk kml kmm kms ksa ksb ksc ksk ksl ksm kss la- laa lab lac lak lal lam las lba lbb lbc lbk lbl lbm lbs lca lcb lcc lck lcl lcm lcs lka lkb lkl lks lla llb llc llk lll llm lls lma lmb lmc lmk lml lmm lms lsa lsb lsc lsk lsl lsm lss maa mab mac mak mal mam mas mba mbb mbc mbk mbl mbm mbs mc- mca mcb mcc mck mcl mcm mcs mka mkb mkc mkk mkl mkm mks mla mlb mlc mlk mll mlm mls mma mmb mmc mmk mml mmm mms msa msb msc msk msl msm mss saa sab sac sak sal sam sas sba sbb sbc sbk sbl sbm sbs sca scb scc sck scl scm scs sk- ska skb skc skk skl skm sks sla slb slc slk sll slm sls sma smb smc smk sml smm sms ss- ssa ssb ssc ssk ssl ssm sss

a-ak aaaa aaab aaac aaal aaam aaas aaba aabb aabc aabl aabm aaca aacb aacc aack aacl aacm aacs aaka aala aalc aall aals aama aamb aamc aams aasa aasc aasm aass abaa abab abac abak abal abam abas abb- abba abbb abbs abca abcb abcc abcl abcs abla abls abma abmb abmc abms abs- absa absl abss acaa acab acac acas acba acbl acca accc accm accs acks acla aclc acls acma acmc acms acsa acsc acsl acsm acss akaa akal akam akas akca akka aksa alaa alac alak alal alam alas alb- alba albc albm albs alca alcc alcs alk- alka alkb all- alla alll alls alma almc alms alsa alsc amaa amac amal amam amas amb- amba ambs amca amcc amcs amka amla amm- amma amsa amsc amsl amss asaa asab asac asak asal asam asas asba asbm asc- asca ascb ascc ascl aska asks asla asma asml asmm asms assa assc assk assl asss baaa baak baal baam baas baba babb babm babs bac- baca bacc back bacs bak- baka bakl baks bala balc balk ball balm bals bama bamb bamc baml bamm bams basa basc bask bass bbas bbbb bbbs bbcm bblb bbls bcaa bcam bcas bcbc bcbs bcca bccc bccl bccm bccs bcma bcms bcsa bcsc bcsl bcsm bcss blaa blab blac blak blam blas blkb blls blss bmaa bsaa bsac bsam bsas bscs bslc bsms bssc bssm caaa caab caac caal caam caas caba cabs cac- caca cacc cack cacm caka cala calc calk call calm cals cama camb camc camk caml camm cams casa casb casc cask casl casm cass cbac cbal cbbc cbbs cbca cbcc cbcl cbcm cbcs cbka cbkl cbkm cblb cblc cbms cbsa cbsc cbsm ccaa ccab ccac ccam ccas ccba ccbc ccca cccb cccc cccl cccm cccs cckm ccla cclc cclm ccls ccma ccmb ccmc ccmm ccms ccsa ccsl ccss ckac ckbc ckck ckcl ckcm ckcs cklm ckml cksa cksb cksl clab clam clas clsa clsc clsm cmaa cmac cmas cmba cmbc cmbs cmcc cmcs cmla cmll cmmb cmmc cmml cmms cmsa cmsc csaa csab csac csak csas csbm cscb cscc cscl cscs cska csks csla csma csmc cssa cssm kaaa kaab kaak kaal kaam kaas kaba kabb kabc kacb kacc kacl kacs kaka kakc kakk kakm kaks kala kalb kalc kalk kall kalm kals kam- kama kamb kamc kaml kamm kams kas- kasa kasb kasc kask kasl kasm kass kbaa kbab kbac kbak kbal kbam kbas kbba kbbb kbbc kbbk kbbl kbbm kbbs kbca kbcb kbck kbcl kbcs kbkb kbkk kbkl kbla kblb kbll kblm kbls kbmb kbmc kbms kbsa kbsb kbsk kbsm kbss kcaa kcab kcac kcal kcam kcas kcba kcbc kcbk kcbl kcbs kcca kccb kccc kcck kccl kckc kckk kckl kckm kcla kclc kclk kcll kclm kcls kcmb kcmc kcmk kcml kcmm kcms kcsa kcsb kcsc kcsm kcss kkaa kkac kkal kkam kkba kkbb kkbl kkbs kkcb kkck kkcl kkcm kkcs kkkk kklb kklc kkll kkls kkma kkmc kkmk kkml kkms kksa kksm kkss klaa klab klac klak klal klam klas klbb klbc klbl klbm klbs klca klcb klcc klck klcl klcm klcs klka klkc klkk klkl klks klla kllb kllc kllk klls klmk klmm klms klsa klsc klsm kmac kmak kmal kmam kmas kmbc kmbl kmbs kmca kmcb kmcc kmcl kmcm kmcs kmkk kmkl kmks kmla kmlb kmlk kmls kmmk kmml kmmm kmms kmsa kmsb kmsc kmsl kmss ksab ksac ksak ksal ksam ksas ksba ksbc ksbl ksbs ksca kscb ksck kscl kscm kscs kska kskb kskk ksks ksla kslb kslc kslk ksll kslm ksma ksmb ksmc ksml ksmm ksms kssa kssl kssm ksss laaa laac laak laal laam laas laba labs laca lacc lack lacl lacs laka laks lala lall lalm lama lamb lamk lamm lams lasa lask lasm lass lbcc lbmc lbms lbsc lcac lcbc lcca lccc lccm lccs lcls lcms lcsc lkab lkal llbs llcc llcs llks lllc llll