-ic c-- ccc ccd cci cco ccs cdc cdd cdi cdo cds ci- cic cid cii cio cis co- coc cod coi coo cos csc csd csi cso css dcc dcd dci dco dcs ddc ddd ddi ddo dds di- dic did dii dio dis doc dod doi doo dos dsc dsd dsi dso dss i-d icc icd ici ico ics idc idd idi ido ids iic iid iii iio iis io- ioc iod ioi ioo ios is- isc isd isi iso iss o-i oc- occ ocd oci oco ocs odc odd odi odo ods oic oid oii oio ois oo- ooc ood ooi ooo oos os- osc osd osi oso oss scc scd sci sco scs sdc sdd sdi sdo sds sic sid sii sio sis soc sod soi soo sos ss- ssc ssd ssi sso sss