-ic c-- ccc ccd cci ccs cct cdc cdd cdi cds cdt cdy ci- cic cid cii cis cit csc csd csi css cst csy ctc ctd cti cts ctt cty cyc cyd cys cyt dcc dcd dci dcs dct ddc ddd ddi dds ddt ddy di- dic did dii dis dit diy dsc dsd dsi dss dst dsy dtc dtd dti dts dtt dty dy- dyc dyd dys dyy i-d icc icd ici ics ict icy idc idd idi ids idt idy iic iid iii iis iit is- isc isd isi iss ist isy itc itd iti its itt ity iyc iys iyt iyy scc scd sci scs sct sdc sdd sdi sds sdt sdy sic sid sii sis sit ss- ssc ssd ssi sss sst stc std sti sts stt sty sy- syc syd syi sys syt tcc tcd tci tcs tct tdc tdd tdi tds tdt tdy tic tid tii tis tit tiy tsc tsd tsi tss tst tsy ttc ttd tti tts ttt tty tyc tyd tys tyt ycc ycd yci ycs ycy yds ydt ydy yid yii yis yit ysc ysi yss yst ysy ytc ytd yts ytt yyc yys yyt yyy