-ic c-- ccc ccd cce cci cco ccp cdc cdd cde cdi cdo cdp ce- cec ced cee cei ceo cep ci- cic cid cie cii cio cip co- coc cod coe coi coo cop cpc cpd cpe cpi cpo cpp dcc dcd dce dci dco dcp ddc ddd dde ddi ddo ddp de- dec ded dee dei deo dep di- dic did die dii dio dip doc dod doe doi doo dop dpc dpd dpe dpi dpo dpp ec- ecc ecd ece eci eco ed- edc edd ede edi edo edp eec eed eee eeo eep eic eid eie eii eio eip eo- eoc eod eoe eoi eoo eop ep- epc epd epe epi epo epp i-d icc icd ice ici ico icp idc idd ide idi ido idp ie- iec ied iee iei iep iic iid iie iii iio iip io- ioc iod ioe ioi ioo iop ipc ipd ipe ipi ipo ipp o-i oc- occ ocd oci oco ocp odc odd ode odi odo odp oec oed oee oei oeo oep oic oid oie oii oio oip oo- ooc ood ooi ooo oop op- opc opd ope opi opo opp p-p pcc pcd pce pci pco pcp pdc pdd pde pdi pdo pdp pec ped pee pei peo pep pic pid pie pii pio pip poc pod poe poi poo pop ppc ppd ppe ppi ppo ppp