-ic c-- ccc ccd cci ccs cct cdc cdd cdi cds cdt ci- cic cid cii cis cit csc csd csi css cst ctc ctd cti cts ctt dcc dcd dci dcs dct ddc ddd ddi dds ddt di- dic did dii dis dit dsc dsd dsi dss dst dtc dtd dti dts dtt i-d icc icd ici ics ict idc idd idi ids idt iic iid iii iis iit is- isc isd isi iss ist itc itd iti its itt scc scd sci scs sct sdc sdd sdi sds sdt sic sid sii sis sit ss- ssc ssd ssi sss sst stc std sti sts stt tcc tcd tci tcs tct tdc tdd tdi tds tdt tic tid tii tis tit tsc tsd tsi tss tst ttc ttd tti tts ttt