-al -ol a-a a-b a-c aaa aab aac aak aal aam aao aar aas ab- aba abb abc abk abl abm abo abr abs ac- aca acb acc ack acl acm aco acr acs aka akb akc akk akl akm ako akr aks al- ala alb alc alk all alm alo alr als ama amb amc amk aml amm amo amr ams aoa aob aoc aok aol aom aoo aor aos ar- ara arb arc ark arl arm aro arr ars as- asa asb asc ask asl asm aso asr ass baa bab bac bak bal bam bao bar bas bba bbb bbc bbk bbl bbm bbo bbr bbs bca bcb bcc bck bcl bcm bco bcr bcs bka bkb bkc bkk bkl bkm bko bkr bks bla blb blc blk bll blm blo blr bls bma bmb bmc bmk bml bmm bmo bmr bms boa bob boc bok bol bom boo bor bos bra brb brk brl brm bro brr brs bsa bsb bsc bsk bsl bsm bso bsr bss c-- caa cab cac cak cal cam cao car cas cba cbb cbc cbk cbl cbm cbo cbr cbs cca ccb ccc cck ccl ccm cco ccr ccs cka ckb ckc ckm cko cks cl- cla clb clc clk cll clm clo clr cls cma cmb cmc cmk cml cmm cmo cmr cms co- coa cob coc cok col com coo cor cos cra crb crc crk crl crm cro crr crs csa csb csc csk csl csm cso csr css ka- kaa kab kac kak kal kam kao kar kas kba kbb kbc kbk kbl kbm kbo kbr kbs kca kcb kcc kck kcl kcm kcr kcs kkb kkc kkk kkl kkm kkr kks kl- kla klb klc klm klo klr kls kma kmb kmc kmk kml kmm kmo kms koa kob koc kok kol kom koo kor kos kra krc krk krl kro krr krs ksa ksb ksc ksk ksl ksm kso ksr kss la- laa lab lac lak lal lam lao lar las lba lbb lbc lbk lbl lbm lbo lbr lbs lca lcb lcc lck lcl lcm lco lcr lcs lka lkb lkl lkr lks lla llb llc llk lll llm llo llr lls lma lmb lmc lmk lml lmm lmo lmr lms loa lob loc lok lol lom loo lor los lra lrb lrc lrk lrm lro lrr lrs lsa lsb lsc lsk lsl lsm lso lsr lss m-o m-r maa mab mac mak mal mam mao mar mas mba mbb mbc mbk mbl mbm mbo mbr mbs mc- mca mcb mcc mck mcl mcm mco mcr mcs mka mkb mkc mkk mkl mkm mko mkr mks mla mlb mlc mlk mll mlm mlo mlr mls mma mmb mmc mmk mml mmm mmo mmr mms moa mob moc mok mol mom moo mor mos mra mrb mrc mrk mrl mrm mro mrr mrs msa msb msc msk msl msm mso msr mss oaa oab oac oak oal oam oao oar oas ob- oba obb obc obk obl obm obo obr obs oc- oca ocb occ ock ocl ocm oco ocr ocs oka okb okc okk okl oko okr oks ola olb olc olk oll olm olo ols om- oma omb omc oml omm omo omr oms oo- ooa oob ooc ook ool oom ooo oor oos or- ora orb orc ork orl orm oro orr ors os- osa osb osc osk osl osm oso osr oss ra- raa rab rac rak ral ram rao rar ras rba rbb rbc rbk rbl rbm rbo rbr rbs rca rcb rcc rcl rcm rco rcr rcs rkb rkc rkk rkm rko rks rla rlc rll rlm rlo rlr rls rma rmb rmc rml rmm rmo rmr rms roa rob roc rok rol rom roo ror ros rra rrb rrc rrk rrl rrm rrr rrs rsa rsb rsc rsk rsl rsm rso rsr rss saa sab sac sak sal sam sao sar sas sba sbb sbc sbk sbl sbm sbo sbr sbs sca scb scc sck scl scm sco scr scs sk- ska skb skc skk skl skm sko skr sks sla slb slc slk sll slm slo slr sls sma smb smc smk sml smm smo smr sms soa sob soc sok sol som soo sor sos sr- sra srb src srk srl srm sro srr srs ss- ssa ssb ssc ssk ssl ssm sso ssr sss

a-ak a-ok aaaa aaab aaac aaal aaam aaar aaas aaba aabb aabc aabl aabm aaca aacb aacc aack aacl aacm aaco aacr aacs aaka aala aalc aall aalo aals aama aamb aamc aamo aamr aams aaoo aara aarc aarm aaro aars aasa aasc aasm aass abaa abab abac abak abal abam abar abas abb- abba abbb abbo abbr abbs abca abcb abcc abcl abcr abcs abla ablo abls abma abmb abmc abms aboa abob abok abol aboo abor abos abra abrc abro abrs abs- absa absl abss acaa acab acac acar acas acba acbl acca accc accm acco accs acks acla aclc aclr acls acma acmc acms acoa acol acom acor acos acr- acra acrc acrm acro acrr acrs acsa acsc acsl acsm acss akaa akal akam akao akar akas akca akka akko aklo akok akom akos akr- akra aksa alaa alac alak alal alam alao alar alas alb- alba albc albm albo albs alca alcc alco alcs alk- alka alkb alko all- alla alll allo allr alls alma almc almo alms aloa aloc alok alol alom aloo alor alos alro alsa alsc also amaa amac amal amam amar amas amb- amba ambo ambr ambs amca amcc amco amcs amka amla amm- amma ammo amob amoc amok amol amoo amor amos amra amrc amrl amro amsa amsc amsl amso amss aoba aoca aocs aoks aola aoma aora aorb aors aoss arab arac arak aral aram arar aras arba arbs arc- arca arcm arco arcs arka arko arks arla arlo arma armc arml armm armo arms aroa arob arom aroo aror aros arr- arra arrc arrk arro arrr arrs ars- arsa