-er c-- ccc ccd cce ccf cco ccp ccr cct cdc cdd cde cdf cdo cdp cdr cdt ce- cec ced cee cef ceo cep cer cet cfc cfd cfe cff cfo cfp cfr cft co- coc cod coe cof coo cop cor cot cpc cpd cpe cpf cpo cpp cpr cpt crc crd cre crf cro crp crr crt ctc ctd cte ctf cto ctp ctr ctt dcc dcd dce dcf dco dcp dcr dct ddc ddd dde ddf ddo ddp ddr ddt de- dec ded dee def deo dep der det dfc dfd dfe dff dfo dfp dfr dft doc dod doe dof doo dop dor dot dpc dpd dpe dpf dpo dpp dpr dpt drc drd dre dro drp drr drt dtc dtd dte dtf dto dtp dtr dtt ec- ecc ecd ece ecf eco ecr ect ed- edc edd ede edf edo edp edr edt eec eed eee eef eeo eep eer eet ef- efc efd efe eff efo efp efr eft eo- eoc eod eoe eof eoo eop eor eot ep- epc epd epe epf epo epp epr ept erc erd ere erf ero erp err ert etc etd ete etf eto etp etr ett fcc fcd fce fcf fco fcp fcr fct fdc fdd fde fdf fdo fdp fdr fdt fec fed fee fef feo fep fer fet ffc ffd ffe fff ffo ffp ffr fft foc foe fof foo fop for fot fpc fpd fpe fpo fpp fpr fpt frc frd fre frf fro frp frr frt ftc ftd fte ftf fto ftp ftr ftt oc- occ ocd ocf oco ocp ocr oct odc odd ode odf odo odp odr odt oec oed oee oef oeo oep oer oet of- ofc ofd ofe off ofo ofp ofr oft oo- ooc ood oof ooo oop oor oot op- opc opd ope opf opo opp opr opt or- orc ord ore orf oro orp orr ort ot- otc otd ote otf oto otp otr ott p-p pcc pcd pce pcf pco pcp pcr pct pdc pdd pde pdf pdo pdp pdr pdt pec ped pee pef peo pep per pet pfc pfd pfe pff pfo pfp pfr pft poc pod poe pof poo pop por pot ppc ppd ppe ppf ppo ppp ppr ppt prc prd pre prf pro prp prr prt pt- ptc ptd pte ptf pto ptp ptr ptt rcc rcd rce rcf rco rcp rcr rct rdc rdd rde rdf rdo rdp rdr rdt re- rec red ree ref reo rep rer ret rfc rfd rfe rff rfo rfp rfr rft roc rod roe rof roo rop ror rot rpc rpd rpe rpf rpo rpp rpr rpt rrc rrd rrf rrp rrr rrt rtc rtd rte rtf rto rtp rtr rtt tcc tcd tce tcf tco tcp tcr tct tdc tdd tde tdf tdo tdp tdr tdt te- tec ted tee tef teo tep ter tet tfc tfd tfe tff tfo tfp tfr tft to- toc tod toe tof too top tor tot tpc tpd tpe tpf tpo tpp tpr tpt trc trd tre trf tro trp trr trt ttc ttd tte ttf tto ttp ttr ttt