-al a-a a-b a-c aaa aab aac aak aal aam aar aas ab- aba abb abc abk abl abm abr abs ac- aca acb acc ack acl acm acr acs aka akb akc akk akl akm akr aks al- ala alb alc alk all alm alr als ama amb amc amk aml amm amr ams ar- ara arb arc ark arl arm arr ars as- asa asb asc ask asl asm asr ass baa bab bac bak bal bam bar bas bba bbb bbc bbk bbl bbm bbr bbs bca bcb bcc bck bcl bcm bcr bcs bka bkb bkc bkk bkl bkm bkr bks bla blb blc blk bll blm blr bls bma bmb bmc bmk bml bmm bmr bms bra brb brk brl brm brr brs bsa bsb bsc bsk bsl bsm bsr bss c-- caa cab cac cak cal cam car cas cba cbb cbc cbk cbl cbm cbr cbs cca ccb ccc cck ccl ccm ccr ccs cka ckb ckc ckm cks cl- cla clb clc clk cll clm clr cls cma cmb cmc cmk cml cmm cmr cms cra crb crc crk crl crm crr crs csa csb csc csk csl csm csr css ka- kaa kab kac kak kal kam kar kas kba kbb kbc kbk kbl kbm kbr kbs kca kcb kcc kck kcl kcm kcr kcs kkb kkc kkk kkl kkm kkr kks kl- kla klb klc klm klr kls kma kmb kmc kmk kml kmm kms kra krc krk krl krr krs ksa ksb ksc ksk ksl ksm ksr kss la- laa lab lac lak lal lam lar las lba lbb lbc lbk lbl lbm lbr lbs lca lcb lcc lck lcl lcm lcr lcs lka lkb lkl lkr lks lla llb llc llk lll llm llr lls lma lmb lmc lmk lml lmm lmr lms lra lrb lrc lrk lrm lrr lrs lsa lsb lsc lsk lsl lsm lsr lss m-r maa mab mac mak mal mam mar mas mba mbb mbc mbk mbl mbm mbr mbs mc- mca mcb mcc mck mcl mcm mcr mcs mka mkb mkc mkk mkl mkm mkr mks mla mlb mlc mlk mll mlm mlr mls mma mmb mmc mmk mml mmm mmr mms mra mrb mrc mrk mrl mrm mrr mrs msa msb msc msk msl msm msr mss ra- raa rab rac rak ral ram rar ras rba rbb rbc rbk rbl rbm rbr rbs rca rcb rcc rcl rcm rcr rcs rkb rkc rkk rkm rks rla rlc rll rlm rlr rls rma rmb rmc rml rmm rmr rms rra rrb rrc rrk rrl rrm rrr rrs rsa rsb rsc rsk rsl rsm rsr rss saa sab sac sak sal sam sar sas sba sbb sbc sbk sbl sbm sbr sbs sca scb scc sck scl scm scr scs sk- ska skb skc skk skl skm skr sks sla slb slc slk sll slm slr sls sma smb smc smk sml smm smr sms sr- sra srb src srk srl srm srr srs ss- ssa ssb ssc ssk ssl ssm ssr sss

a-ak aaaa aaab aaac aaal aaam aaar aaas aaba aabb aabc aabl aabm aaca aacb aacc aack aacl aacm aacr aacs aaka aala aalc aall aals aama aamb aamc aamr aams aara aarc aarm aars aasa aasc aasm aass abaa abab abac abak abal abam abar abas abb- abba abbb abbr abbs abca abcb abcc abcl abcr abcs abla abls abma abmb abmc abms abra abrc abrs abs- absa absl abss acaa acab acac acar acas acba acbl acca accc accm accs acks acla aclc aclr acls acma acmc acms acr- acra acrc acrm acrr acrs acsa acsc acsl acsm acss akaa akal akam akar akas akca akka akr- akra aksa alaa alac alak alal alam alar alas alb- alba albc albm albs alca alcc alcs alk- alka alkb all- alla alll allr alls alma almc alms alsa alsc amaa amac amal amam amar amas amb- amba ambr ambs amca amcc amcs amka amla amm- amma amra amrc amrl amsa amsc amsl amss arab arac arak aral aram arar aras arba arbs arc- arca arcm arcs arka arks arla arma armc arml armm arms arr- arra arrc arrk arrr arrs ars- arsa arsc arsk asaa asab asac asak asal asam asar asas asba asbm asc- asca ascb ascc ascl ascr aska askr asks asla aslr asma asml asmm asmr asms asra asrc asrm asrs assa assc assk assl assr asss baaa baak baal baam baar baas baba babb babm babr babs bac- baca bacc back bacs bak- baka bakl bakr baks bala balc balk ball balm bals bama bamb bamc baml bamm bams bar- bara barb barc bark barm barr bars basa basc bask bass bbas bbbb bbbs bbcm bblb bbls bbrc bcaa bcam bcar bcas bcbc bcbs bcca bccc bccl bccm bccs bcma bcms bcra bcrs bcsa bcsc bcsl bcsm bcss blaa blab blac blak blam blas blkb blls blrc blss bmaa brab brac brak bram bras brca brcb brka brkb brls brmc brrm brrr brrs brsb brsr bsaa bsac bsam bsas bscs bslc bsms bsra bsrm bssc bssm caaa caab caac caal caam caas caba cabs cac- caca cacc cack cacm cacr caka cala calc calk call calm cals cama camb camc camk caml camm cams cara carb carc cark carl carm carr cars casa casb casc cask casl casm casr cass cbac cbal cbar cbbc cbbs cbca cbcc cbcl cbcm cbcr cbcs cbka cbkl cbkm cbkr cblb cblc cbms cbrl cbrm cbsa cbsc cbsm ccaa ccab ccac ccam ccar ccas ccba ccbc ccca cccb cccc cccl cccm cccs cckm ccla cclc cclm ccls ccma ccmb ccmc ccmm ccms ccra ccrc ccrl ccrs ccsa ccsl ccss ckac ckbc ckck ckcl ckcm ckcs cklm ckml ckrc ckrm cksa cksb cksl clab clam clar clas clra clrs clsa clsc clsm cmaa cmac cmas cmba cmbc cmbs cmcc cmcs cmla cmll cmmb cmmc cmml cmms cmra cmrr cmrs cmsa cmsc crab crac cram crar cras crbc crca crcc crcr crkc