-al -ol a-a a-c aaa aac aak aal aao aar aas ac- aca acc ack acl aco acr acs aka akc akk akl ako akr aks al- ala alc alk all alo alr als aoa aoc aok aol aoo aor aos ar- ara arc ark arl aro arr ars as- asa asc ask asl aso asr ass c-- caa cac cak cal cao car cas cca ccc cck ccl cco ccr ccs cka ckc cko cks cl- cla clc clk cll clo clr cls co- coa coc cok col coo cor cos cra crc crk crl cro crr crs csa csc csk csl cso csr css ka- kaa kac kak kal kao kar kas kca kcc kck kcl kcr kcs kkc kkk kkl kkr kks kl- kla klc klo klr kls koa koc kok kol koo kor kos kra krc krk krl kro krr krs ksa ksc ksk ksl kso ksr kss la- laa lac lak lal lao lar las lca lcc lck lcl lco lcr lcs lka lkl lkr lks lla llc llk lll llo llr lls loa loc lok lol loo lor los lra lrc lrk lro lrr lrs lsa lsc lsk lsl lso lsr lss oaa oac oak oal oao oar oas oc- oca occ ock ocl oco ocr ocs oka okc okk okl oko okr oks ola olc olk oll olo ols oo- ooa ooc ook ool ooo oor oos or- ora orc ork orl oro orr ors os- osa osc osk osl oso osr oss ra- raa rac rak ral rao rar ras rca rcc rcl rco rcr rcs rkc rkk rko rks rla rlc rll rlo rlr rls roa roc rok rol roo ror ros rra rrc rrk rrl rrr rrs rsa rsc rsk rsl rso rsr rss saa sac sak sal sao sar sas sca scc sck scl sco scr scs sk- ska skc skk skl sko skr sks sla slc slk sll slo slr sls soa soc sok sol soo sor sos sr- sra src srk srl sro srr srs ss- ssa ssc ssk ssl sso ssr sss