-ic c-- ccc ccd cci ccr ccv cdc cdd cdi cdr cdv ci- cic cid cii cir civ crc crd cri crr crv cvc cvd cvi cvr cvv dcc dcd dci dcr dcv ddc ddd ddi ddr di- dic did dii dir div drc drd dri drr drv dvc dvd dvi dvr i-d i-v icc icd ici icr icv idc idd idi idr idv iic iid iii iir ir- irc ird iri irr irv ivc ivd ivi ivr ivv rcc rcd rci rcr rcv rdc rdd rdi rdr rdv ric rid rii rir riv rrc rrd rri rrr rvc rvd rvi rvr rvv vcc vcd vci vcr vdc vdd vdi vdr vdv vi- vic vid vii vir viv vrc vrd vri vrr vvc vvi vvr vvv