-ic c-- ccc ccd ccf cci ccs cdc cdd cdf cdi cds cfc cfd cff cfi cfs ci- cic cid cif cii cis csc csd csf csi css dcc dcd dcf dci dcs ddc ddd ddf ddi dds dfc dfd dff dfi dfs di- dic did dif dii dis dsc dsd dsf dsi dss fcc fcd fcf fci fcs fdc fdd fdf fdi fds ffc ffd fff ffi ffs fic fid fif fii fis fsc fsd fsf fsi fss i-d i-f icc icd icf ici ics idc idd idf idi ids ifc ifd iff ifi ifs iic iid iif iii iis is- isc isd isf isi iss scc scd scf sci scs sdc sdd sdf sdi sds sfc sfd sff sfi sfs sic sid sif sii sis ss- ssc ssd ssf ssi sss