-er a-a a-c a-t aaa aac aad aae aag aan aao aar aat ac- aca acc acd ace acg acn aco acr act ad- ada adc add ade adg adn ado adr adt aea aec aed aee aeg aen aeo aer aet ag- aga agc agd age agg agn ago agr agt an- ana anc and ane ang ann ano anr ant aoa aoc aod aoe aog aon aoo aor aot ar- ara arc ard are arg arn aro arr art at- ata atc atd ate atg atn ato atr att c-- caa cac cad cae cag can cao car cat cca ccc ccd cce ccg ccn cco ccr cct cda cdc cdd cde cdg cdn cdo cdr cdt ce- cea cec ced cee ceg cen ceo cer cet cga cgc cgd cge cgg cgn cgo cgr cgt cn- cna cnc cnd cne cng cnn cno cnr cnt co- coa coc cod coe cog con coo cor cot cra crc crd cre crg crn cro crr crt cta ctc ctd cte ctg ctn cto ctr ctt daa dac dad dae dag dan dao dar dat dca dcc dcd dce dcg dcn dco dcr dct dda ddc ddd dde ddg ddn ddo ddr ddt de- dea dec ded dee deg den deo der det dga dgc dgd dge dgg dgn dgr dgt dna dnc dnd dne dng dnn dno dnr dnt doa doc dod doe dog don doo dor dot dra drc drd dre drg drn dro drr drt dta dtc dtd dte dtg dtn dto dtr dtt eaa eac ead eae eag ean eao ear eat ec- eca ecc ecd ece ecg ecn eco ecr ect ed- eda edc edd ede edg edn edo edr edt eea eec eed eee eeg een eeo eer eet ega egc egd ege egg egn ego egr egt en- ena enc end ene eng enn eno enr ent eo- eoa eoc eod eoe eog eon eoo eor eot era erc erd ere erg ern ero err ert eta etc etd ete etg etn eto etr ett g-d gaa gac gad gae gag gan gao gar gat gca gcc gcd gce gcg gcn gco gcr gct gda gdc gdd gde gdn gdo gdr gdt ge- gea gec ged gee geg gen geo ger get gga ggc ggd ggg ggn ggo ggr ggt gna gnc gnd gne gnn gno gnr gnt goa goc god goe gog gon goo gor got gra grc grd gre grg grn gro grr grt gta gtc gtd gte gtg gtn gto gtr gtt naa nac nad nae nag nan nao nar nat nca ncc ncd nce ncg ncn nco ncr nct nda ndc ndd nde ndg ndn ndo ndr ndt ne- nea nec ned nee neg nen neo ner net nga ngc ngd nge ngg ngn ngo ngt nna nnc nne nng nnn nno nnt no- noa noc nod noe nog non noo nor not nra nrc nrd nre nrg nrn nro nrr nrt nta ntc ntd nte ntg ntn nto ntr ntt oaa oac oad oae oag oan oao oar oat oc- oca occ ocd ocg ocn oco ocr oct oda odc odd ode odg odn odo odr odt oea oec oed oee oeg oen oeo oer oet oga ogc ogd oge ogg ogn ogo ogt on- ona onc ond one ong onn ono onr ont oo- ooa ooc ood oog oon ooo oor oot or- ora orc ord ore org orn oro orr ort ot- ota otc otd ote otg otn oto otr ott ra- raa rac rad rae rag ran rao rar rat rca rcc rcd rce rcg rcn rco rcr rct rda rdc rdd rde rdg rdn rdo rdr rdt re- rea rec red ree reg ren reo rer ret rga rgc rgd rge rgg rgn rgo rgr rgt rna rnc rnd rng rnn rno rnr rnt roa roc rod roe rog ron roo ror rot rra rrc rrd rrg rrn rrr rrt rta rtc rtd rte rtg rtn rto rtr rtt taa tac tad tae tag tan tao tar tat tca tcc tcd tce tcg tcn tco tcr tct tda tdc tdd tde tdg tdn tdo tdr tdt te- tea tec ted tee teg ten teo ter tet tga tgc tge tgg tgn tgo tgr tgt tna tnc tnd tne tng tnn tno tnr tnt to- toa toc tod toe tog ton too tor tot tra trc trd tre trg trn tro trr trt tta ttc ttd tte ttg ttn tto ttr ttt