a-a a-c aaa aac aae aag aan aao aas ac- aca acc ace acg acn aco acs aea aec aee aeg aen aeo aes ag- aga agc age agg agn ago ags an- ana anc ane ang ann ano ans aoa aoc aoe aog aon aoo aos as- asa asc ase asg asn aso ass c-- caa cac cae cag can cao cas cca ccc cce ccg ccn cco ccs ce- cea cec cee ceg cen ceo ces cga cgc cge cgg cgn cgo cgs cn- cna cnc cne cng cnn cno cns co- coa coc coe cog con coo cos csa csc cse csg csn cso css eaa eac eae eag ean eao eas ec- eca ecc ece ecg ecn eco ecs eea eec eee eeg een eeo ees ega egc ege egg egn ego egs en- ena enc ene eng enn eno ens eo- eoa eoc eoe eog eon eoo eos es- esa esc ese esg esn eso ess gaa gac gae gag gan gao gas gca gcc gce gcg gcn gco gcs ge- gea gec gee geg gen geo ges gga ggc ggg ggn ggo ggs gna gnc gne gnn gno gns goa goc goe gog gon goo gos gsa gsc gse gsg gsn gso gss naa nac nae nag nan nao nas nca ncc nce ncg ncn nco ncs ne- nea nec nee neg nen neo nes nga ngc nge ngg ngn ngo ngs nna nnc nne nng nnn nno nns no- noa noc noe nog non noo nos nsa nsc nse nsg nsn nso nss oaa oac oae oag oan oao oas oc- oca occ ocg ocn oco ocs oea oec oee oeg oen oeo oes oga ogc oge ogg ogn ogo ogs on- ona onc one ong onn ono ons oo- ooa ooc oog oon ooo oos os- osa osc ose osg osn oso oss saa sac sae sag san sao sas sca scc sce scg scn sco scs se- sea sec see seg sen seo ses sga sgc sge sgg sgn sgo sgs sna snc sne sng snn sno sns soa soc soe sog son soo sos ss- ssa ssc sse ssg ssn sso sss