-ic c-- ccc ccd cci ccp ccs cdc cdd cdi cdp cds cdy ci- cic cid cii cip cis cpc cpd cpi cpp cps csc csd csi csp css csy cyc cyd cyp cys dcc dcd dci dcp dcs ddc ddd ddi ddp dds ddy di- dic did dii dip dis diy dpc dpd dpi dpp dps dsc dsd dsi dsp dss dsy dy- dyc dyd dyp dys dyy i-d icc icd ici icp ics icy idc idd idi idp ids idy iic iid iii iip iis ipc ipd ipi ipp ips ipy is- isc isd isi isp iss isy iyc iys iyy p-p pcc pcd pci pcp pcs pdc pdd pdi pdp pds pic pid pii pip pis ppc ppd ppi ppp pps ps- psc psd psi psp pss psy py- pyc pyd pys scc scd sci scp scs sdc sdd sdi sdp sds sdy sic sid sii sip sis spc spd spi spp sps spy ss- ssc ssd ssi ssp sss sy- syc syd syi syp sys ycc ycd yci ycp ycs ycy yds ydy yid yii yip yis ypd yps ysc ysi ysp yss ysy yyc yys yyy