-er a-a a-c a-t aaa aac aad aae aaf aap aar aat ac- aca acc acd ace acf acp acr act ad- ada adc add ade adf adp adr adt aea aec aed aee aef aep aer aet af- afa afc afd afe aff afp afr aft ap- apa apc apd ape apf app apr apt ar- ara arc ard are arf arp arr art at- ata atc atd ate atf atp atr att c-- caa cac cad cae caf cap car cat cca ccc ccd cce ccf ccp ccr cct cda cdc cdd cde cdf cdp cdr cdt ce- cea cec ced cee cef cep cer cet cfa cfc cfd cfe cff cfp cfr cft cpa cpc cpd cpe cpf cpp cpr cpt cra crc crd cre crf crp crr crt cta ctc ctd cte ctf ctp ctr ctt daa dac dad dae daf dap dar dat dca dcc dcd dce dcf dcp dcr dct dda ddc ddd dde ddf ddp ddr ddt de- dea dec ded dee def dep der det dfa dfc dfd dfe dff dfp dfr dft dpa dpc dpd dpe dpf dpp dpr dpt dra drc drd dre drp drr drt dta dtc dtd dte dtf dtp dtr dtt eaa eac ead eae eaf eap ear eat ec- eca ecc ecd ece ecf ecr ect ed- eda edc edd ede edf edp edr edt eea eec eed eee eef eep eer eet ef- efa efc efd efe eff efp efr eft ep- epa epc epd epe epf epp epr ept era erc erd ere erf erp err ert eta etc etd ete etf etp etr ett faa fac fad fae faf fap far fat fca fcc fcd fce fcf fcp fcr fct fda fdc fdd fde fdf fdp fdr fdt fea fec fed fee fef fep fer fet ffa ffc ffd ffe fff ffp ffr fft fpa fpc fpd fpe fpp fpr fpt fra frc frd fre frf frp frr frt fta ftc ftd fte ftf ftp ftr ftt p-p paa pac pad pae paf pap par pat pca pcc pcd pce pcf pcp pcr pct pda pdc pdd pde pdf pdp pdr pdt pea pec ped pee pef pep per pet pfa pfc pfd pfe pff pfp pfr pft ppa ppc ppd ppe ppf ppp ppr ppt pra prc prd pre prf prp prr prt pt- pta ptc ptd pte ptf ptp ptr ptt ra- raa rac rad rae raf rap rar rat rca rcc rcd rce rcf rcp rcr rct rda rdc rdd rde rdf rdp rdr rdt re- rea rec red ree ref rep rer ret rfa rfc rfd rfe rff rfp rfr rft rpa rpc rpd rpe rpf rpp rpr rpt rra rrc rrd rrf rrp rrr rrt rta rtc rtd rte rtf rtp rtr rtt taa tac tad tae taf tap tar tat tca tcc tcd tce tcf tcp tcr tct tda tdc tdd tde tdf tdp tdr tdt te- tea tec ted tee tef tep ter tet tfa tfc tfd tfe tff tfp tfr tft tpa tpc tpd tpe tpf tpp tpr tpt tra trc trd tre trf trp trr trt tta ttc ttd tte ttf ttp ttr ttt