-er a-a a-c a-t aaa aac aad aae aaf aan aar aat ac- aca acc acd ace acf acn acr act ad- ada adc add ade adf adn adr adt aea aec aed aee aef aen aer aet af- afa afc afd afe aff afn afr aft an- ana anc and ane anf ann anr ant ar- ara arc ard are arf arn arr art at- ata atc atd ate atf atn atr att c-- caa cac cad cae caf can car cat cca ccc ccd cce ccf ccn ccr cct cda cdc cdd cde cdf cdn cdr cdt ce- cea cec ced cee cef cen cer cet cfa cfc cfd cfe cff cfn cfr cft cn- cna cnc cnd cne cnf cnn cnr cnt cra crc crd cre crf crn crr crt cta ctc ctd cte ctf ctn ctr ctt daa dac dad dae daf dan dar dat dca dcc dcd dce dcf dcn dcr dct dda ddc ddd dde ddf ddn ddr ddt de- dea dec ded dee def den der det dfa dfc dfd dfe dff dfn dfr dft dna dnc dnd dne dnf dnn dnr dnt dra drc drd dre drn drr drt dta dtc dtd dte dtf dtn dtr dtt eaa eac ead eae eaf ean ear eat ec- eca ecc ecd ece ecf ecn ecr ect ed- eda edc edd ede edf edn edr edt eea eec eed eee eef een eer eet ef- efa efc efd efe eff efr eft en- ena enc end ene enf enn enr ent era erc erd ere erf ern err ert eta etc etd ete etf etn etr ett faa fac fad fae faf fan far fat fca fcc fcd fce fcf fcn fcr fct fda fdc fdd fde fdf fdn fdr fdt fea fec fed fee fef fen fer fet ffa ffc ffd ffe fff ffn ffr fft fna fnc fnd fne fnf fnn fnr fnt fra frc frd fre frf frn frr frt fta ftc ftd fte ftf ftn ftr ftt naa nac nad nae naf nan nar nat nca ncc ncd nce ncf ncn ncr nct nda ndc ndd nde ndf ndn ndr ndt ne- nea nec ned nee nef nen ner net nfa nfc nfd nfe nff nfn nfr nft nna nnc nne nnf nnn nnt nra nrc nrd nre nrf nrn nrr nrt nta ntc ntd nte ntf ntn ntr ntt ra- raa rac rad rae raf ran rar rat rca rcc rcd rce rcf rcn rcr rct rda rdc rdd rde rdf rdn rdr rdt re- rea rec red ree ref ren rer ret rfa rfc rfd rfe rff rfn rfr rft rna rnc rnd rnn rnr rnt rra rrc rrd rrf rrn rrr rrt rta rtc rtd rte rtf rtn rtr rtt taa tac tad tae taf tan tar tat tca tcc tcd tce tcf tcn tcr tct tda tdc tdd tde tdf tdn tdr tdt te- tea tec ted tee tef ten ter tet tfa tfc tfd tfe tff tfn tfr tft tna tnc tnd tne tnf tnn tnr tnt tra trc trd tre trf trn trr trt tta ttc ttd tte ttf ttn ttr ttt