-er a-a a-c a-t aaa aac aad aae aao aar aas aat ac- aca acc acd ace aco acr acs act ad- ada adc add ade ado adr ads adt aea aec aed aee aeo aer aes aet aoa aoc aod aoe aoo aor aos aot ar- ara arc ard are aro arr ars art as- asa asc asd ase aso asr ass ast at- ata atc atd ate ato atr ats att c-- caa cac cad cae cao car cas cat cca ccc ccd cce cco ccr ccs cct cda cdc cdd cde cdo cdr cds cdt ce- cea cec ced cee ceo cer ces cet co- coa coc cod coe coo cor cos cot cra crc crd cre cro crr crs crt csa csc csd cse cso csr css cst cta ctc ctd cte cto ctr cts ctt daa dac dad dae dao dar das dat dca dcc dcd dce dco dcr dcs dct dda ddc ddd dde ddo ddr dds ddt de- dea dec ded dee deo der des det doa doc dod doe doo dor dos dot dra drc drd dre dro drr drs drt dsa dsc dsd dse dso dsr dss dst dta dtc dtd dte dto dtr dts dtt eaa eac ead eae eao ear eas eat ec- eca ecc ecd ece eco ecr ecs ect ed- eda edc edd ede edo edr eds edt eea eec eed eee eeo eer ees eet eo- eoa eoc eod eoe eoo eor eos eot era erc erd ere ero err ers ert es- esa esc esd ese eso esr ess est eta etc etd ete eto etr ets ett oaa oac oad oae oao oar oas oat oc- oca occ ocd oco ocr ocs oct oda odc odd ode odo odr ods odt oea oec oed oee oeo oer oes oet oo- ooa ooc ood ooo oor oos oot or- ora orc ord ore oro orr ors ort os- osa osc osd ose oso osr oss ost ot- ota otc otd ote oto otr ots ott ra- raa rac rad rae rao rar ras rat rca rcc rcd rce rco rcr rcs rct rda rdc rdd rde rdo rdr rds rdt re- rea rec red ree reo rer res ret roa roc rod roe roo ror ros rot rra rrc rrd rrr rrs rrt rsa rsc rsd rse rso rsr rss rst rta rtc rtd rte rto rtr rts rtt saa sac sad sae sao sar sas sat sca scc scd sce sco scr scs sct sda sdc sdd sde sdo sdr sds sdt se- sea sec sed see seo ser ses set soa soc sod soe soo sor sos sot sr- sra src srd sre sro srr srs srt ss- ssa ssc ssd sse sso ssr sss sst sta stc std ste sto str sts stt taa tac tad tae tao tar tas tat tca tcc tcd tce tco tcr tcs tct tda tdc tdd tde tdo tdr tds tdt te- tea tec ted tee teo ter tes tet to- toa toc tod toe too tor tos tot tra trc trd tre tro trr trs trt tsa tsc tsd tse tso tsr tss tst tta ttc ttd tte tto ttr tts ttt