-ol c-- ccc ccd ccf ccl cco ccr ccs cdc cdd cdf cdl cdo cdr cds cfc cfd cff cfl cfo cfr cfs cl- clc cld clf cll clo clr cls co- coc cod cof col coo cor cos crc crd crf crl cro crr crs csc csd csf csl cso csr css dcc dcd dcf dcl dco dcr dcs ddc ddd ddf ddl ddo ddr dds dfc dfd dff dfl dfo dfr dfs dl- dlc dld dlf dll dlo dlr dls doc dod dof dol doo dor dos drc drd drl dro drr drs dsc dsd dsf dsl dso dsr dss fcc fcd fcf fcl fco fcr fcs fdc fdd fdf fdl fdo fdr fds ffc ffd fff ffl ffo ffr ffs flc fld flf fll flo flr fls foc fof fol foo for fos frc frd frf frl fro frr frs fsc fsd fsf fsl fso fsr fss lcc lcd lcf lcl lco lcr lcs ldc ldd ldf ldl ldo ldr lds lfc lfd lff lfl lfo lfr lfs llc lld llf lll llo llr lls loc lod lof lol loo lor los lrc lrd lrf lro lrr lrs lsc lsd lsf lsl lso lsr lss oc- occ ocd ocf ocl oco ocr ocs odc odd odf odl odo odr ods of- ofc ofd off ofl ofo ofr ofs olc old olf oll olo ols oo- ooc ood oof ool ooo oor oos or- orc ord orf orl oro orr ors os- osc osd osf osl oso osr oss rcc rcd rcf rcl rco rcr rcs rdc rdd rdf rdl rdo rdr rds rfc rfd rff rfl rfo rfr rfs rlc rld rlf rll rlo rlr rls roc rod rof rol roo ror ros rrc rrd rrf rrl rrr rrs rsc rsd rsf rsl rso rsr rss scc scd scf scl sco scr scs sdc sdd sdf sdl sdo sdr sds sfc sfd sff sfl sfo sfr sfs slc sld slf sll slo slr sls soc sod sof sol soo sor sos sr- src srd srf srl sro srr srs ss- ssc ssd ssf ssl sso ssr sss