-er -ic c-- ccc ccd cce ccf cci ccp ccr cdc cdd cde cdf cdi cdp cdr ce- cec ced cee cef cei cep cer cfc cfd cfe cff cfi cfp cfr ci- cic cid cie cif cii cip cir cpc cpd cpe cpf cpi cpp cpr crc crd cre crf cri crp crr dcc dcd dce dcf dci dcp dcr ddc ddd dde ddf ddi ddp ddr de- dec ded dee def dei dep der dfc dfd dfe dff dfi dfp dfr di- dic did die dif dii dip dir dpc dpd dpe dpf dpi dpp dpr drc drd dre dri drp drr ec- ecc ecd ece ecf eci ecr ed- edc edd ede edf edi edp edr eec eed eee eef eep eer ef- efc efd efe eff efi efp efr eic eid eie eif eii eip eir ep- epc epd epe epf epi epp epr erc erd ere erf eri erp err fcc fcd fce fcf fci fcp fcr fdc fdd fde fdf fdi fdp fdr fec fed fee fef fei fep fer ffc ffd ffe fff ffi ffp ffr fic fid fie fif fii fip fir fpc fpd fpe fpi fpp fpr frc frd fre frf fri frp frr i-d i-f icc icd ice icf ici icp icr idc idd ide idf idi idp idr ie- iec ied iee ief iei iep ier ifc ifd ife iff ifi ifp ifr iic iid iie iif iii iip iir ipc ipd ipe ipf ipi ipp ipr ir- irc ird ire irf iri irp irr p-p pcc pcd pce pcf pci pcp pcr pdc pdd pde pdf pdi pdp pdr pec ped pee pef pei pep per pfc pfd pfe pff pfi pfp pfr pic pid pie pif pii pip pir ppc ppd ppe ppf ppi ppp ppr prc prd pre prf pri prp prr rcc rcd rce rcf rci rcp rcr rdc rdd rde rdf rdi rdp rdr re- rec red ree ref rei rep rer rfc rfd rfe rff rfi rfp rfr ric rid rie rif rii rip rir rpc rpd rpe rpf rpi rpp rpr rrc rrd rrf rri rrp rrr