-er a-a a-c a-t aaa aac aad aae aao aap aar aat ac- aca acc acd ace aco acp acr act ad- ada adc add ade ado adp adr adt aea aec aed aee aeo aep aer aet aoa aoc aod aoe aoo aop aor aot ap- apa apc apd ape apo app apr apt ar- ara arc ard are aro arp arr art at- ata atc atd ate ato atp atr att c-- caa cac cad cae cao cap car cat cca ccc ccd cce cco ccp ccr cct cda cdc cdd cde cdo cdp cdr cdt ce- cea cec ced cee ceo cep cer cet co- coa coc cod coe coo cop cor cot cpa cpc cpd cpe cpo cpp cpr cpt cra crc crd cre cro crp crr crt cta ctc ctd cte cto ctp ctr ctt daa dac dad dae dao dap dar dat dca dcc dcd dce dco dcp dcr dct dda ddc ddd dde ddo ddp ddr ddt de- dea dec ded dee deo dep der det doa doc dod doe doo dop dor dot dpa dpc dpd dpe dpo dpp dpr dpt dra drc drd dre dro drp drr drt dta dtc dtd dte dto dtp dtr dtt eaa eac ead eae eao eap ear eat ec- eca ecc ecd ece eco ecr ect ed- eda edc edd ede edo edp edr edt eea eec eed eee eeo eep eer eet eo- eoa eoc eod eoe eoo eop eor eot ep- epa epc epd epe epo epp epr ept era erc erd ere ero erp err ert eta etc etd ete eto etp etr ett oaa oac oad oae oao oap oar oat oc- oca occ ocd oco ocp ocr oct oda odc odd ode odo odp odr odt oea oec oed oee oeo oep oer oet oo- ooa ooc ood ooo oop oor oot op- opa opc opd ope opo opp opr opt or- ora orc ord ore oro orp orr ort ot- ota otc otd ote oto otp otr ott p-p paa pac pad pae pao pap par pat pca pcc pcd pce pco pcp pcr pct pda pdc pdd pde pdo pdp pdr pdt pea pec ped pee peo pep per pet poa poc pod poe poo pop por pot ppa ppc ppd ppe ppo ppp ppr ppt pra prc prd pre pro prp prr prt pt- pta ptc ptd pte pto ptp ptr ptt ra- raa rac rad rae rao rap rar rat rca rcc rcd rce rco rcp rcr rct rda rdc rdd rde rdo rdp rdr rdt re- rea rec red ree reo rep rer ret roa roc rod roe roo rop ror rot rpa rpc rpd rpe rpo rpp rpr rpt rra rrc rrd rrp rrr rrt rta rtc rtd rte rto rtp rtr rtt taa tac tad tae tao tap tar tat tca tcc tcd tce tco tcp tcr tct tda tdc tdd tde tdo tdp tdr tdt te- tea tec ted tee teo tep ter tet to- toa toc tod toe too top tor tot tpa tpc tpd tpe tpo tpp tpr tpt tra trc trd tre tro trp trr trt tta ttc ttd tte tto ttp ttr ttt