-ol c-- ccc cck ccl cco ccr ccs ckc cko cks cl- clc clk cll clo clr cls co- coc cok col coo cor cos crc crk crl cro crr crs csc csk csl cso csr css kcc kck kcl kcr kcs kkc kkk kkl kkr kks kl- klc klo klr kls koc kok kol koo kor kos krc krk krl kro krr krs ksc ksk ksl kso ksr kss lcc lck lcl lco lcr lcs lkl lkr lks llc llk lll llo llr lls loc lok lol loo lor los lrc lrk lro lrr lrs lsc lsk lsl lso lsr lss oc- occ ock ocl oco ocr ocs okc okk okl oko okr oks olc olk oll olo ols oo- ooc ook ool ooo oor oos or- orc ork orl oro orr ors os- osc osk osl oso osr oss rcc rcl rco rcr rcs rkc rkk rko rks rlc rll rlo rlr rls roc rok rol roo ror ros rrc rrk rrl rrr rrs rsc rsk rsl rso rsr rss scc sck scl sco scr scs sk- skc skk skl sko skr sks slc slk sll slo slr sls soc sok sol soo sor sos sr- src srk srl sro srr srs ss- ssc ssk ssl sso ssr sss