-er a-a a-c a-t aaa aac aad aae aan aar aas aat ac- aca acc acd ace acn acr acs act ad- ada adc add ade adn adr ads adt aea aec aed aee aen aer aes aet an- ana anc and ane ann anr ans ant ar- ara arc ard are arn arr ars art as- asa asc asd ase asn asr ass ast at- ata atc atd ate atn atr ats att c-- caa cac cad cae can car cas cat cca ccc ccd cce ccn ccr ccs cct cda cdc cdd cde cdn cdr cds cdt ce- cea cec ced cee cen cer ces cet cn- cna cnc cnd cne cnn cnr cns cnt cra crc crd cre crn crr crs crt csa csc csd cse csn csr css cst cta ctc ctd cte ctn ctr cts ctt daa dac dad dae dan dar das dat dca dcc dcd dce dcn dcr dcs dct dda ddc ddd dde ddn ddr dds ddt de- dea dec ded dee den der des det dna dnc dnd dne dnn dnr dns dnt dra drc drd dre drn drr drs drt dsa dsc dsd dse dsn dsr dss dst dta dtc dtd dte dtn dtr dts dtt eaa eac ead eae ean ear eas eat ec- eca ecc ecd ece ecn ecr ecs ect ed- eda edc edd ede edn edr eds edt eea eec eed eee een eer ees eet en- ena enc end ene enn enr ens ent era erc erd ere ern err ers ert es- esa esc esd ese esn esr ess est eta etc etd ete etn etr ets ett naa nac nad nae nan nar nas nat nca ncc ncd nce ncn ncr ncs nct nda ndc ndd nde ndn ndr nds ndt ne- nea nec ned nee nen ner nes net nna nnc nne nnn nns nnt nra nrc nrd nre nrn nrr nrs nrt nsa nsc nsd nse nsn nsr nss nst nta ntc ntd nte ntn ntr nts ntt ra- raa rac rad rae ran rar ras rat rca rcc rcd rce rcn rcr rcs rct rda rdc rdd rde rdn rdr rds rdt re- rea rec red ree ren rer res ret rna rnc rnd rnn rnr rns rnt rra rrc rrd rrn rrr rrs rrt rsa rsc rsd rse rsn rsr rss rst rta rtc rtd rte rtn rtr rts rtt saa sac sad sae san sar sas sat sca scc scd sce scn scr scs sct sda sdc sdd sde sdn sdr sds sdt se- sea sec sed see sen ser ses set sna snc snd sne snn snr sns snt sr- sra src srd sre srn srr srs srt ss- ssa ssc ssd sse ssn ssr sss sst sta stc std ste stn str sts stt taa tac tad tae tan tar tas tat tca tcc tcd tce tcn tcr tcs tct tda tdc tdd tde tdn tdr tds tdt te- tea tec ted tee ten ter tes tet tna tnc tnd tne tnn tnr tns tnt tra trc trd tre trn trr trs trt tsa tsc tsd tse tsn tsr tss tst tta ttc ttd tte ttn ttr tts ttt