-er a-a a-c a-t aaa aac aad aae aaf aao aap aar aat ac- aca acc acd ace acf aco acp acr act ad- ada adc add ade adf ado adp adr adt aea aec aed aee aef aeo aep aer aet af- afa afc afd afe aff afo afp afr aft aoa aoc aod aoe aof aoo aop aor aot ap- apa apc apd ape apf apo app apr apt ar- ara arc ard are arf aro arp arr art at- ata atc atd ate atf ato atp atr att c-- caa cac cad cae caf cao cap car cat cca ccc ccd cce ccf cco ccp ccr cct cda cdc cdd cde cdf cdo cdp cdr cdt ce- cea cec ced cee cef ceo cep cer cet cfa cfc cfd cfe cff cfo cfp cfr cft co- coa coc cod coe cof coo cop cor cot cpa cpc cpd cpe cpf cpo cpp cpr cpt cra crc crd cre crf cro crp crr crt cta ctc ctd cte ctf cto ctp ctr ctt daa dac dad dae daf dao dap dar dat dca dcc dcd dce dcf dco dcp dcr dct dda ddc ddd dde ddf ddo ddp ddr ddt de- dea dec ded dee def deo dep der det dfa dfc dfd dfe dff dfo dfp dfr dft doa doc dod doe dof doo dop dor dot dpa dpc dpd dpe dpf dpo dpp dpr dpt dra drc drd dre dro drp drr drt dta dtc dtd dte dtf dto dtp dtr dtt eaa eac ead eae eaf eao eap ear eat ec- eca ecc ecd ece ecf eco ecr ect ed- eda edc edd ede edf edo edp edr edt eea eec eed eee eef eeo eep eer eet ef- efa efc efd efe eff efo efp efr eft eo- eoa eoc eod eoe eof eoo eop eor eot ep- epa epc epd epe epf epo epp epr ept era erc erd ere erf ero erp err ert eta etc etd ete etf eto etp etr ett faa fac fad fae faf fao fap far fat fca fcc fcd fce fcf fco fcp fcr fct fda fdc fdd fde fdf fdo fdp fdr fdt fea fec fed fee fef feo fep fer fet ffa ffc ffd ffe fff ffo ffp ffr fft foa foc foe fof foo fop for fot fpa fpc fpd fpe fpo fpp fpr fpt fra frc frd fre frf fro frp frr frt fta ftc ftd fte ftf fto ftp ftr ftt oaa oac oad oae oaf oao oap oar oat oc- oca occ ocd ocf oco ocp ocr oct oda odc odd ode odf odo odp odr odt oea oec oed oee oef oeo oep oer oet of- ofa ofc ofd ofe off ofo ofp ofr oft oo- ooa ooc ood oof ooo oop oor oot op- opa opc opd ope opf opo opp opr opt or- ora orc ord ore orf oro orp orr ort ot- ota otc otd ote otf oto otp otr ott p-p paa pac pad pae paf pao pap par pat pca pcc pcd pce pcf pco pcp pcr pct pda pdc pdd pde pdf pdo pdp pdr pdt pea pec ped pee pef peo pep per pet pfa pfc pfd pfe pff pfo pfp pfr pft poa poc pod poe pof poo pop por pot ppa ppc ppd ppe ppf ppo ppp ppr ppt pra prc prd pre prf pro prp prr prt pt- pta ptc ptd pte ptf pto ptp ptr ptt ra- raa rac rad rae raf rao rap rar rat rca rcc rcd rce rcf rco rcp rcr rct rda rdc rdd rde rdf rdo rdp rdr rdt re- rea rec red ree ref reo rep rer ret rfa rfc rfd rfe rff rfo rfp rfr rft roa roc rod roe rof roo rop ror rot rpa rpc rpd rpe rpf rpo rpp rpr rpt rra rrc rrd rrf rrp rrr rrt rta rtc rtd rte rtf rto rtp rtr rtt taa tac tad tae taf tao tap tar tat tca tcc tcd tce tcf tco tcp tcr tct tda tdc tdd tde tdf tdo tdp tdr tdt te- tea tec ted tee tef teo tep ter tet tfa tfc tfd tfe tff tfo tfp tfr tft to- toa toc tod toe tof too top tor tot tpa tpc tpd tpe tpf tpo tpp tpr tpt tra trc trd tre trf tro trp trr trt tta ttc ttd tte ttf tto ttp ttr ttt