-ic c-- ccc ccd cci ccr cct ccv cdc cdd cdi cdr cdt cdv ci- cic cid cii cir cit civ crc crd cri crr crt crv ctc ctd cti ctr ctt ctv cvc cvd cvi cvr cvt cvv dcc dcd dci dcr dct dcv ddc ddd ddi ddr ddt di- dic did dii dir dit div drc drd dri drr drt drv dtc dtd dti dtr dtt dtv dvc dvd dvi dvr dvt i-d i-v icc icd ici icr ict icv idc idd idi idr idt idv iic iid iii iir iit ir- irc ird iri irr irt irv itc itd iti itt itv ivc ivd ivi ivr ivt ivv rcc rcd rci rcr rct rcv rdc rdd rdi rdr rdt rdv ric rid rii rir rit riv rrc rrd rri rrr rrt rtc rtd rti rtr rtt rtv rvc rvd rvi rvr rvt rvv tcc tcd tci tcr tct tcv tdc tdd tdi tdr tdt tdv tic tid tii tir tit tiv trc trd tri trr trt trv ttc ttd tti ttr ttt ttv tvc tvd tvi tvr tvt vcc vcd vci vcr vct vdc vdd vdi vdr vdt vdv vi- vic vid vii vir vit viv vrc vrd vri vrr vrt vtc vti vtr vtt vtv vvc vvi vvr vvt vvv