-ol c-- ccc ccd ccl cco ccr cdc cdd cdl cdo cdr cl- clc cld cll clo clr co- coc cod col coo cor crc crd crl cro crr dcc dcd dcl dco dcr ddc ddd ddl ddo ddr dl- dlc dld dll dlo dlr doc dod dol doo dor drc drd drl dro drr lcc lcd lcl lco lcr ldc ldd ldl ldo ldr llc lld lll llo llr loc lod lol loo lor lrc lrd lro lrr oc- occ ocd ocl oco ocr odc odd odl odo odr olc old oll olo oo- ooc ood ool ooo oor or- orc ord orl oro orr rcc rcd rcl rco rcr rdc rdd rdl rdo rdr rlc rld rll rlo rlr roc rod rol roo ror rrc rrd rrl rrr