-ic c-- ccc ccd cci cco ccr ccs cdc cdd cdi cdo cdr cds ci- cic cid cii cio cir cis co- coc cod coi coo cor cos crc crd cri cro crr crs csc csd csi cso csr css dcc dcd dci dco dcr dcs ddc ddd ddi ddo ddr dds di- dic did dii dio dir dis doc dod doi doo dor dos drc drd dri dro drr drs dsc dsd dsi dso dsr dss i-d icc icd ici ico icr ics idc idd idi ido idr ids iic iid iii iio iir iis io- ioc iod ioi ioo ior ios ir- irc ird iri iro irr irs is- isc isd isi iso isr iss o-i oc- occ ocd oci oco ocr ocs odc odd odi odo odr ods oic oid oii oio oir ois oo- ooc ood ooi ooo oor oos or- orc ord ori oro orr ors os- osc osd osi oso osr oss rcc rcd rci rco rcr rcs rdc rdd rdi rdo rdr rds ric rid rii rio rir ris roc rod roi roo ror ros rrc rrd rri rrr rrs rsc rsd rsi rso rsr rss scc scd sci sco scr scs sdc sdd sdi sdo sdr sds sic sid sii sio sir sis soc sod soi soo sor sos sr- src srd sri sro srr srs ss- ssc ssd ssi sso ssr sss