-er a-a a-c aaa aac aad aae aag aan aao aar aas ac- aca acc acd ace acg acn aco acr acs ad- ada adc add ade adg adn ado adr ads aea aec aed aee aeg aen aeo aer aes ag- aga agc agd age agg agn ago agr ags an- ana anc and ane ang ann ano anr ans aoa aoc aod aoe aog aon aoo aor aos ar- ara arc ard are arg arn aro arr ars as- asa asc asd ase asg asn aso asr ass c-- caa cac cad cae cag can cao car cas cca ccc ccd cce ccg ccn cco ccr ccs cda cdc cdd cde cdg cdn cdo cdr cds ce- cea cec ced cee ceg cen ceo cer ces cga cgc cgd cge cgg cgn cgo cgr cgs cn- cna cnc cnd cne cng cnn cno cnr cns co- coa coc cod coe cog con coo cor cos cra crc crd cre crg crn cro crr crs csa csc csd cse csg csn cso csr css daa dac dad dae dag dan dao dar das dca dcc dcd dce dcg dcn dco dcr dcs dda ddc ddd dde ddg ddn ddo ddr dds de- dea dec ded dee deg den deo der des dga dgc dgd dge dgg dgn dgr dgs dna dnc dnd dne dng dnn dno dnr dns doa doc dod doe dog don doo dor dos dra drc drd dre drg drn dro drr drs dsa dsc dsd dse dsg dsn dso dsr dss eaa eac ead eae eag ean eao ear eas ec- eca ecc ecd ece ecg ecn eco ecr ecs ed- eda edc edd ede edg edn edo edr eds eea eec eed eee eeg een eeo eer ees ega egc egd ege egg egn ego egr egs en- ena enc end ene eng enn eno enr ens eo- eoa eoc eod eoe eog eon eoo eor eos era erc erd ere erg ern ero err ers es- esa esc esd ese esg esn eso esr ess g-d gaa gac gad gae gag gan gao gar gas gca gcc gcd gce gcg gcn gco gcr gcs gda gdc gdd gde gdn gdo gdr gds ge- gea gec ged gee geg gen geo ger ges gga ggc ggd ggg ggn ggo ggr ggs gna gnc gnd gne gnn gno gnr gns goa goc god goe gog gon goo gor gos gra grc grd gre grg grn gro grr grs gsa gsc gsd gse gsg gsn gso gsr gss naa nac nad nae nag nan nao nar nas nca ncc ncd nce ncg ncn nco ncr ncs nda ndc ndd nde ndg ndn ndo ndr nds ne- nea nec ned nee neg nen neo ner nes nga ngc ngd nge ngg ngn ngo ngs nna nnc nne nng nnn nno nns no- noa noc nod noe nog non noo nor nos nra nrc nrd nre nrg nrn nro nrr nrs nsa nsc nsd nse nsg nsn nso nsr nss oaa oac oad oae oag oan oao oar oas oc- oca occ ocd ocg ocn oco ocr ocs oda odc odd ode odg odn odo odr ods oea oec oed oee oeg oen oeo oer oes oga ogc ogd oge ogg ogn ogo ogs on- ona onc ond one ong onn ono onr ons oo- ooa ooc ood oog oon ooo oor oos or- ora orc ord ore org orn oro orr ors os- osa osc osd ose osg osn oso osr oss ra- raa rac rad rae rag ran rao rar ras rca rcc rcd rce rcg rcn rco rcr rcs rda rdc rdd rde rdg rdn rdo rdr rds re- rea rec red ree reg ren reo rer res rga rgc rgd rge rgg rgn rgo rgr rgs rna rnc rnd rng rnn rno rnr rns roa roc rod roe rog ron roo ror ros rra rrc rrd rrg rrn rrr rrs rsa rsc rsd rse rsg rsn rso rsr rss saa sac sad sae sag san sao sar sas sca scc scd sce scg scn sco scr scs sda sdc sdd sde sdg sdn sdo sdr sds se- sea sec sed see seg sen seo ser ses sga sgc sgd sge sgg sgn sgo sgr sgs sna snc snd sne sng snn sno snr sns soa soc sod soe sog son soo sor sos sr- sra src srd sre srg srn sro srr srs ss- ssa ssc ssd sse ssg ssn sso ssr sss