-ic c-- ccc ccd ccf cci cco ccs cdc cdd cdf cdi cdo cds cfc cfd cff cfi cfo cfs ci- cic cid cif cii cio cis co- coc cod cof coi coo cos csc csd csf csi cso css dcc dcd dcf dci dco dcs ddc ddd ddf ddi ddo dds dfc dfd dff dfi dfo dfs di- dic did dif dii dio dis doc dod dof doi doo dos dsc dsd dsf dsi dso dss fcc fcd fcf fci fco fcs fdc fdd fdf fdi fdo fds ffc ffd fff ffi ffo ffs fic fid fif fii fis foc fof foi foo fos fsc fsd fsf fsi fso fss i-d i-f icc icd icf ici ico ics idc idd idf idi ido ids ifc ifd iff ifi ifo ifs iic iid iif iii iio iis io- ioc iod iof ioi ioo ios is- isc isd isf isi iso iss o-i oc- occ ocd ocf oci oco ocs odc odd odf odi odo ods of- ofc ofd off ofi ofo ofs oic oid oif oii oio ois oo- ooc ood oof ooi ooo oos os- osc osd osf osi oso oss scc scd scf sci sco scs sdc sdd sdf sdi sdo sds sfc sfd sff sfi sfo sfs sic sid sif sii sio sis soc sod sof soi soo sos ss- ssc ssd ssf ssi sso sss