a-a a-c aaa aac aae aag aao aas ac- aca acc ace acg aco acs aea aec aee aeg aeo aes ag- aga agc age agg ago ags aoa aoc aoe aog aoo aos as- asa asc ase asg aso ass c-- caa cac cae cag cao cas cca ccc cce ccg cco ccs ce- cea cec cee ceg ceo ces cga cgc cge cgg cgo cgs co- coa coc coe cog coo cos csa csc cse csg cso css eaa eac eae eag eao eas ec- eca ecc ece ecg eco ecs eea eec eee eeg eeo ees ega egc ege egg ego egs eo- eoa eoc eoe eog eoo eos es- esa esc ese esg eso ess gaa gac gae gag gao gas gca gcc gce gcg gco gcs ge- gea gec gee geg geo ges gga ggc ggg ggo ggs goa goc goe gog goo gos gsa gsc gse gsg gso gss oaa oac oae oag oao oas oc- oca occ ocg oco ocs oea oec oee oeg oeo oes oga ogc oge ogg ogo ogs oo- ooa ooc oog ooo oos os- osa osc ose osg oso oss saa sac sae sag sao sas sca scc sce scg sco scs se- sea sec see seg seo ses sga sgc sge sgg sgo sgs soa soc soe sog soo sos ss- ssa ssc sse ssg sso sss