a-a a-c a-t aaa aac aae aaf aag aas aat ac- aca acc ace acf acg acs act aea aec aee aef aeg aes aet af- afa afc afe aff afg afs aft ag- aga agc age agf agg ags agt as- asa asc ase asf asg ass ast at- ata atc ate atf atg ats att c-- caa cac cae caf cag cas cat cca ccc cce ccf ccg ccs cct ce- cea cec cee cef ceg ces cet cfa cfc cfe cff cfg cfs cft cga cgc cge cgg cgs cgt csa csc cse csf csg css cst cta ctc cte ctf ctg cts ctt eaa eac eae eaf eag eas eat ec- eca ecc ece ecf ecg ecs ect eea eec eee eef eeg ees eet ef- efa efc efe eff efg efs eft ega egc ege egf egg egs egt es- esa esc ese esf esg ess est eta etc ete etf etg ets ett faa fac fae faf fag fas fat fca fcc fce fcf fcg fcs fct fea fec fee fef feg fes fet ffa ffc ffe fff ffg ffs fft fga fgc fge fgf fgg fgs fgt fsa fsc fse fsf fsg fss fst fta ftc fte ftf ftg fts ftt gaa gac gae gaf gag gas gat gca gcc gce gcf gcg gcs gct ge- gea gec gee gef geg ges get gfa gfc gfe gff gfs gft gga ggc ggg ggs ggt gsa gsc gse gsf gsg gss gst gta gtc gte gtf gtg gts gtt saa sac sae saf sag sas sat sca scc sce scf scg scs sct se- sea sec see sef seg ses set sfa sfc sfe sff sfg sfs sft sga sgc sge sgf sgg sgs sgt ss- ssa ssc sse ssf ssg sss sst sta stc ste stf stg sts stt taa tac tae taf tag tas tat tca tcc tce tcf tcg tcs tct te- tea tec tee tef teg tes tet tfa tfc tfe tff tfg tfs tft tga tgc tge tgf tgg tgs tgt tsa tsc tse tsf tsg tss tst tta ttc tte ttf ttg tts ttt