-ic c-- ccc ccd cci cco ccr cdc cdd cdi cdo cdr ci- cic cid cii cio cir co- coc cod coi coo cor crc crd cri cro crr dcc dcd dci dco dcr ddc ddd ddi ddo ddr di- dic did dii dio dir doc dod doi doo dor drc drd dri dro drr i-d icc icd ici ico icr idc idd idi ido idr iic iid iii iio iir io- ioc iod ioi ioo ior ir- irc ird iri iro irr o-i oc- occ ocd oci oco ocr odc odd odi odo odr oic oid oii oio oir oo- ooc ood ooi ooo oor or- orc ord ori oro orr rcc rcd rci rco rcr rdc rdd rdi rdo rdr ric rid rii rio rir roc rod roi roo ror rrc rrd rri rrr