-ic c-- ccc ccd cci ccp cdc cdd cdi cdp cdy ci- cic cid cii cip cpc cpd cpi cpp cyc cyd cyp dcc dcd dci dcp ddc ddd ddi ddp ddy di- dic did dii dip diy dpc dpd dpi dpp dy- dyc dyd dyp dyy i-d icc icd ici icp icy idc idd idi idp idy iic iid iii iip ipc ipd ipi ipp ipy iyc iyy p-p pcc pcd pci pcp pdc pdd pdi pdp pic pid pii pip ppc ppd ppi ppp py- pyc pyd ycc ycd yci ycp ycy ydy yid yii yip ypd yyc yyy