-er a-a a-c a-t aaa aac aae aag aao aar aat aav ac- aca acc ace acg aco acr act acv aea aec aee aeg aeo aer aet aev ag- aga agc age agg ago agr agt agv aoa aoc aoe aog aoo aor aot aov ar- ara arc are arg aro arr art arv at- ata atc ate atg ato atr att atv av- ava avc ave avg avo avr avt c-- caa cac cae cag cao car cat cav cca ccc cce ccg cco ccr cct ccv ce- cea cec cee ceg ceo cer cet cev cga cgc cge cgg cgo cgr cgt cgv co- coa coc coe cog coo cor cot cov cra crc cre crg cro crr crt crv cta ctc cte ctg cto ctr ctt ctv cva cvc cve cvg cvo cvr cvt cvv eaa eac eae eag eao ear eat eav ec- eca ecc ece ecg eco ecr ect ecv eea eec eee eeg eeo eer eet eev ega egc ege egg ego egr egt eo- eoa eoc eoe eog eoo eor eot era erc ere erg ero err ert erv eta etc ete etg eto etr ett etv eva evc eve evg evo evr evt evv gaa gac gae gag gao gar gat gav gca gcc gce gcg gco gcr gct ge- gea gec gee geg geo ger get gev gga ggc ggg ggo ggr ggt ggv goa goc goe gog goo gor got gov gra grc gre grg gro grr grt grv gta gtc gte gtg gto gtr gtt gtv gva gvc gve gvg gvo gvr gvt oaa oac oae oag oao oar oat oav oc- oca occ ocg oco ocr oct ocv oea oec oee oeg oeo oer oet oga ogc oge ogg ogo ogt oo- ooa ooc oog ooo oor oot oov or- ora orc ore org oro orr ort orv ot- ota otc ote otg oto otr ott otv ov- ova ovc ove ovo ovv ra- raa rac rae rag rao rar rat rav rca rcc rce rcg rco rcr rct rcv re- rea rec ree reg reo rer ret rev rga rgc rge rgg rgo rgr rgt rgv roa roc roe rog roo ror rot rov rra rrc rrg rrr rrt rta rtc rte rtg rto rtr rtt rtv rva rvc rve rvg rvo rvr rvt rvv taa tac tae tag tao tar tat tav tca tcc tce tcg tco tcr tct tcv te- tea tec tee teg teo ter tet tev tga tgc tge tgg tgo tgr tgt tgv to- toa toc toe tog too tor tot tov tra trc tre trg tro trr trt trv tta ttc tte ttg tto ttr ttt ttv tva tvc tve tvg tvo tvr tvt v-a v-e vaa vac vae vag vao var vat vav vca vcc vce vco vcr vct vea vec vee veg veo ver vet vga vgc vgg vgo vgr vgt voa voc voe vog voo vor vot vov vra vrc vre vrg vrr vrt vta vtc vte vtg vto vtr vtt vtv vva vvc vvg vvo vvr vvt vvv