-er -ic c-- ccc ccd cce cci cco ccp ccr cdc cdd cde cdi cdo cdp cdr ce- cec ced cee cei ceo cep cer ci- cic cid cie cii cio cip cir co- coc cod coe coi coo cop cor cpc cpd cpe cpi cpo cpp cpr crc crd cre cri cro crp crr dcc dcd dce dci dco dcp dcr ddc ddd dde ddi ddo ddp ddr de- dec ded dee dei deo dep der di- dic did die dii dio dip dir doc dod doe doi doo dop dor dpc dpd dpe dpi dpo dpp dpr drc drd dre dri dro drp drr ec- ecc ecd ece eci eco ecr ed- edc edd ede edi edo edp edr eec eed eee eeo eep eer eic eid eie eii eio eip eir eo- eoc eod eoe eoi eoo eop eor ep- epc epd epe epi epo epp epr erc erd ere eri ero erp err i-d icc icd ice ici ico icp icr idc idd ide idi ido idp idr ie- iec ied iee iei iep ier iic iid iie iii iio iip iir io- ioc iod ioe ioi ioo iop ior ipc ipd ipe ipi ipo ipp ipr ir- irc ird ire iri iro irp irr o-i oc- occ ocd oci oco ocp ocr odc odd ode odi odo odp odr oec oed oee oei oeo oep oer oic oid oie oii oio oip oir oo- ooc ood ooi ooo oop oor op- opc opd ope opi opo opp opr or- orc ord ore ori oro orp orr p-p pcc pcd pce pci pco pcp pcr pdc pdd pde pdi pdo pdp pdr pec ped pee pei peo pep per pic pid pie pii pio pip pir poc pod poe poi poo pop por ppc ppd ppe ppi ppo ppp ppr prc prd pre pri pro prp prr rcc rcd rce rci rco rcp rcr rdc rdd rde rdi rdo rdp rdr re- rec red ree rei reo rep rer ric rid rie rii rio rip rir roc rod roe roi roo rop ror rpc rpd rpe rpi rpo rpp rpr rrc rrd rri rrp rrr