-er a-a a-c a-t aaa aac aad aae aan aar aat ac- aca acc acd ace acn acr act ad- ada adc add ade adn adr adt aea aec aed aee aen aer aet an- ana anc and ane ann anr ant ar- ara arc ard are arn arr art at- ata atc atd ate atn atr att c-- caa cac cad cae can car cat cca ccc ccd cce ccn ccr cct cda cdc cdd cde cdn cdr cdt ce- cea cec ced cee cen cer cet cn- cna cnc cnd cne cnn cnr cnt cra crc crd cre crn crr crt cta ctc ctd cte ctn ctr ctt daa dac dad dae dan dar dat dca dcc dcd dce dcn dcr dct dda ddc ddd dde ddn ddr ddt de- dea dec ded dee den der det dna dnc dnd dne dnn dnr dnt dra drc drd dre drn drr drt dta dtc dtd dte dtn dtr dtt eaa eac ead eae ean ear eat ec- eca ecc ecd ece ecn ecr ect ed- eda edc edd ede edn edr edt eea eec eed eee een eer eet en- ena enc end ene enn enr ent era erc erd ere ern err ert eta etc etd ete etn etr ett naa nac nad nae nan nar nat nca ncc ncd nce ncn ncr nct nda ndc ndd nde ndn ndr ndt ne- nea nec ned nee nen ner net nna nnc nne nnn nnt nra nrc nrd nre nrn nrr nrt nta ntc ntd nte ntn ntr ntt ra- raa rac rad rae ran rar rat rca rcc rcd rce rcn rcr rct rda rdc rdd rde rdn rdr rdt re- rea rec red ree ren rer ret rna rnc rnd rnn rnr rnt rra rrc rrd rrn rrr rrt rta rtc rtd rte rtn rtr rtt taa tac tad tae tan tar tat tca tcc tcd tce tcn tcr tct tda tdc tdd tde tdn tdr tdt te- tea tec ted tee ten ter tet tna tnc tnd tne tnn tnr tnt tra trc trd tre trn trr trt tta ttc ttd tte ttn ttr ttt