-er a-a a-c a-t aaa aac aad aae aag aan aao aar aas aat ac- aca acc acd ace acg acn aco acr acs act ad- ada adc add ade adg adn ado adr ads adt aea aec aed aee aeg aen aeo aer aes aet ag- aga agc agd age agg agn ago agr ags agt an- ana anc and ane ang ann ano anr ans ant aoa aoc aod aoe aog aon aoo aor aos aot ar- ara arc ard are arg arn aro arr ars art as- asa asc asd ase asg asn aso asr ass ast at- ata atc atd ate atg atn ato atr ats att c-- caa cac cad cae cag can cao car cas cat cca ccc ccd cce ccg ccn cco ccr ccs cct cda cdc cdd cde cdg cdn cdo cdr cds cdt ce- cea cec ced cee ceg cen ceo cer ces cet cga cgc cgd cge cgg cgn cgo cgr cgs cgt cn- cna cnc cnd cne cng cnn cno cnr cns cnt co- coa coc cod coe cog con coo cor cos cot cra crc crd cre crg crn cro crr crs crt csa csc csd cse csg csn cso csr css cst cta ctc ctd cte ctg ctn cto ctr cts ctt daa dac dad dae dag dan dao dar das dat dca dcc dcd dce dcg dcn dco dcr dcs dct dda ddc ddd dde ddg ddn ddo ddr dds ddt de- dea dec ded dee deg den deo der des det dga dgc dgd dge dgg dgn dgr dgs dgt dna dnc dnd dne dng dnn dno dnr dns dnt doa doc dod doe dog don doo dor dos dot dra drc drd dre drg drn dro drr drs drt dsa dsc dsd dse dsg dsn dso dsr dss dst dta dtc dtd dte dtg dtn dto dtr dts dtt eaa eac ead eae eag ean eao ear eas eat ec- eca ecc ecd ece ecg ecn eco ecr ecs ect ed- eda edc edd ede edg edn edo edr eds edt eea eec eed eee eeg een eeo eer ees eet ega egc egd ege egg egn ego egr egs egt en- ena enc end ene eng enn eno enr ens ent eo- eoa eoc eod eoe eog eon eoo eor eos eot era erc erd ere erg ern ero err ers ert es- esa esc esd ese esg esn eso esr ess est eta etc etd ete etg etn eto etr ets ett g-d gaa gac gad gae gag gan gao gar gas gat gca gcc gcd gce gcg gcn gco gcr gcs gct gda gdc gdd gde gdn gdo gdr gds gdt ge- gea gec ged gee geg gen geo ger ges get gga ggc ggd ggg ggn ggo ggr ggs ggt gna gnc gnd gne gnn gno gnr gns gnt goa goc god goe gog gon goo gor gos got gra grc grd gre grg grn gro grr grs grt gsa gsc gsd gse gsg gsn gso gsr gss gst gta gtc gtd gte gtg gtn gto gtr gts gtt naa nac nad nae nag nan nao nar nas nat nca ncc ncd nce ncg ncn nco ncr ncs nct nda ndc ndd nde ndg ndn ndo ndr nds ndt ne- nea nec ned nee neg nen neo ner nes net nga ngc ngd nge ngg ngn ngo ngs ngt nna nnc nne nng nnn nno nns nnt no- noa noc nod noe nog non noo nor nos not nra nrc nrd nre nrg nrn nro nrr nrs nrt nsa nsc nsd nse nsg nsn nso nsr nss nst nta ntc ntd nte ntg ntn nto ntr nts ntt oaa oac oad oae oag oan oao oar oas oat oc- oca occ ocd ocg ocn oco ocr ocs oct oda odc odd ode odg odn odo odr ods odt oea oec oed oee oeg oen oeo oer oes oet oga ogc ogd oge ogg ogn ogo ogs ogt on- ona onc ond one ong onn ono onr ons ont oo- ooa ooc ood oog oon ooo oor oos oot or- ora orc ord ore org orn oro orr ors ort os- osa osc osd ose osg osn oso osr oss ost ot- ota otc otd ote otg otn oto otr ots ott ra- raa rac rad rae rag ran rao rar ras rat rca rcc rcd rce rcg rcn rco rcr rcs rct rda rdc rdd rde rdg rdn rdo rdr rds rdt re- rea rec red ree reg ren reo rer res ret rga rgc rgd rge rgg rgn rgo rgr rgs rgt rna rnc rnd rng rnn rno rnr rns rnt roa roc rod roe rog ron roo ror ros rot rra rrc rrd rrg rrn rrr rrs rrt rsa rsc rsd rse rsg rsn rso rsr rss rst rta rtc rtd rte rtg rtn rto rtr rts rtt saa sac sad sae sag san sao sar sas sat sca scc scd sce scg scn sco scr scs sct sda sdc sdd sde sdg sdn sdo sdr sds sdt se- sea sec sed see seg sen seo ser ses set sga sgc sgd sge sgg sgn sgo sgr sgs sgt sna snc snd sne sng snn sno snr sns snt soa soc sod soe sog son soo sor sos sot sr- sra src srd sre srg srn sro srr srs srt ss- ssa ssc ssd sse ssg ssn sso ssr sss sst sta stc std ste stg stn sto str sts stt taa tac tad tae tag tan tao tar tas tat tca tcc tcd tce tcg tcn tco tcr tcs tct tda tdc tdd tde tdg tdn tdo tdr tds tdt te- tea tec ted tee teg ten teo ter tes tet tga tgc tge tgg tgn tgo tgr tgs tgt tna tnc tnd tne tng tnn tno tnr tns tnt to- toa toc tod toe tog ton too tor tos tot tra trc trd tre trg trn