-ic c-- ccc ccd cce cci ccp cdc cdd cde cdi cdp ce- cec ced cee cei cep ci- cic cid cie cii cip cpc cpd cpe cpi cpp dcc dcd dce dci dcp ddc ddd dde ddi ddp de- dec ded dee dei dep di- dic did die dii dip dpc dpd dpe dpi dpp ec- ecc ecd ece eci ed- edc edd ede edi edp eec eed eee eep eic eid eie eii eip ep- epc epd epe epi epp i-d icc icd ice ici icp idc idd ide idi idp ie- iec ied iee iei iep iic iid iie iii iip ipc ipd ipe ipi ipp p-p pcc pcd pce pci pcp pdc pdd pde pdi pdp pec ped pee pei pep pic pid pie pii pip ppc ppd ppe ppi ppp