-ol c-- ccc ccd cck ccl cco ccr ccs cdc cdd cdk cdl cdo cdr cds ckc ckd cko cks cl- clc cld clk cll clo clr cls co- coc cod cok col coo cor cos crc crd crk crl cro crr crs csc csd csk csl cso csr css dcc dcd dck dcl dco dcr dcs ddc ddd ddk ddl ddo ddr dds dkc dkk dkl dko dkr dks dl- dlc dld dlk dll dlo dlr dls doc dod dok dol doo dor dos drc drd drk drl dro drr drs dsc dsd dsk dsl dso dsr dss kcc kcd kck kcl kcr kcs kdc kdk kdl kdo kdr kds kkc kkk kkl kkr kks kl- klc kld klo klr kls koc kod kok kol koo kor kos krc krd krk krl kro krr krs ksc ksd ksk ksl kso ksr kss lcc lcd lck lcl lco lcr lcs ldc ldd ldk ldl ldo ldr lds lkl lkr lks llc lld llk lll llo llr lls loc lod lok lol loo lor los lrc lrd lrk lro lrr lrs lsc lsd lsk lsl lso lsr lss oc- occ ocd ock ocl oco ocr ocs odc odd odl odo odr ods okc okd okk okl oko okr oks olc old olk oll olo ols oo- ooc ood ook ool ooo oor oos or- orc ord ork orl oro orr ors os- osc osd osk osl oso osr oss rcc rcd rcl rco rcr rcs rdc rdd rdl rdo rdr rds rkc rkk rko rks rlc rld rll rlo rlr rls roc rod rok rol roo ror ros rrc rrd rrk rrl rrr rrs rsc rsd rsk rsl rso rsr rss scc scd sck scl sco scr scs sdc sdd sdk sdl sdo sdr sds sk- skc skd skk skl sko skr sks slc sld slk sll slo slr sls soc sod sok sol soo sor sos sr- src srd srk srl sro srr srs ss- ssc ssd ssk ssl sso ssr sss