-ic c-- ccc ccd cci cco ccr cct cdc cdd cdi cdo cdr cdt ci- cic cid cii cio cir cit co- coc cod coi coo cor cot crc crd cri cro crr crt ctc ctd cti cto ctr ctt dcc dcd dci dco dcr dct ddc ddd ddi ddo ddr ddt di- dic did dii dio dir dit doc dod doi doo dor dot drc drd dri dro drr drt dtc dtd dti dto dtr dtt i-d icc icd ici ico icr ict idc idd idi ido idr idt iic iid iii iio iir iit io- ioc iod ioi ioo ior iot ir- irc ird iri iro irr irt itc itd iti ito itt o-i oc- occ ocd oci oco ocr oct odc odd odi odo odr odt oic oid oii oio oir oit oo- ooc ood ooi ooo oor oot or- orc ord ori oro orr ort ot- otc otd oti oto otr ott rcc rcd rci rco rcr rct rdc rdd rdi rdo rdr rdt ric rid rii rio rir rit roc rod roi roo ror rot rrc rrd rri rrr rrt rtc rtd rti rto rtr rtt tcc tcd tci tco tcr tct tdc tdd tdi tdo tdr tdt tic tid tii tio tir tit to- toc tod toi too tor tot trc trd tri tro trr trt ttc ttd tti tto ttr ttt