-er a-a a-c aaa aac aad aae aag aan aar aas ac- aca acc acd ace acg acn acr acs ad- ada adc add ade adg adn adr ads aea aec aed aee aeg aen aer aes ag- aga agc agd age agg agn agr ags an- ana anc and ane ang ann anr ans ar- ara arc ard are arg arn arr ars as- asa asc asd ase asg asn asr ass c-- caa cac cad cae cag can car cas cca ccc ccd cce ccg ccn ccr ccs cda cdc cdd cde cdg cdn cdr cds ce- cea cec ced cee ceg cen cer ces cga cgc cgd cge cgg cgn cgr cgs cn- cna cnc cnd cne cng cnn cnr cns cra crc crd cre crg crn crr crs csa csc csd cse csg csn csr css daa dac dad dae dag dan dar das dca dcc dcd dce dcg dcn dcr dcs dda ddc ddd dde ddg ddn ddr dds de- dea dec ded dee deg den der des dga dgc dgd dge dgg dgn dgr dgs dna dnc dnd dne dng dnn dnr dns dra drc drd dre drg drn drr drs dsa dsc dsd dse dsg dsn dsr dss eaa eac ead eae eag ean ear eas ec- eca ecc ecd ece ecg ecn ecr ecs ed- eda edc edd ede edg edn edr eds eea eec eed eee eeg een eer ees ega egc egd ege egg egn egr egs en- ena enc end ene eng enn enr ens era erc erd ere erg ern err ers es- esa esc esd ese esg esn esr ess g-d gaa gac gad gae gag gan gar gas gca gcc gcd gce gcg gcn gcr gcs gda gdc gdd gde gdn gdr gds ge- gea gec ged gee geg gen ger ges gga ggc ggd ggg ggn ggr ggs gna gnc gnd gne gnn gnr gns gra grc grd gre grg grn grr grs gsa gsc gsd gse gsg gsn gsr gss naa nac nad nae nag nan nar nas nca ncc ncd nce ncg ncn ncr ncs nda ndc ndd nde ndg ndn ndr nds ne- nea nec ned nee neg nen ner nes nga ngc ngd nge ngg ngn ngs nna nnc nne nng nnn nns nra nrc nrd nre nrg nrn nrr nrs nsa nsc nsd nse nsg nsn nsr nss ra- raa rac rad rae rag ran rar ras rca rcc rcd rce rcg rcn rcr rcs rda rdc rdd rde rdg rdn rdr rds re- rea rec red ree reg ren rer res rga rgc rgd rge rgg rgn rgr rgs rna rnc rnd rng rnn rnr rns rra rrc rrd rrg rrn rrr rrs rsa rsc rsd rse rsg rsn rsr rss saa sac sad sae sag san sar sas sca scc scd sce scg scn scr scs sda sdc sdd sde sdg sdn sdr sds se- sea sec sed see seg sen ser ses sga sgc sgd sge sgg sgn sgr sgs sna snc snd sne sng snn snr sns sr- sra src srd sre srg srn srr srs ss- ssa ssc ssd sse ssg ssn ssr sss