a-a a-c aaa aac aae aag aao aap aas ac- aca acc ace acg aco acp acs aea aec aee aeg aeo aep aes ag- aga agc age agg ago agp ags aoa aoc aoe aog aoo aop aos ap- apa apc ape apg apo app aps as- asa asc ase asg aso asp ass c-- caa cac cae cag cao cap cas cca ccc cce ccg cco ccp ccs ce- cea cec cee ceg ceo cep ces cga cgc cge cgg cgo cgp cgs co- coa coc coe cog coo cop cos cpa cpc cpe cpg cpo cpp cps csa csc cse csg cso csp css eaa eac eae eag eao eap eas ec- eca ecc ece ecg eco ecs eea eec eee eeg eeo eep ees ega egc ege egg ego egp egs eo- eoa eoc eoe eog eoo eop eos ep- epa epc epe epg epo epp eps es- esa esc ese esg eso esp ess g-p gaa gac gae gag gao gap gas gca gcc gce gcg gco gcp gcs ge- gea gec gee geg geo gep ges gga ggc ggg ggo ggp ggs goa goc goe gog goo gop gos gpa gpc gpe gpg gpo gpp gps gsa gsc gse gsg gso gsp gss oaa oac oae oag oao oap oas oc- oca occ ocg oco ocp ocs oea oec oee oeg oeo oep oes oga ogc oge ogg ogo ogp ogs oo- ooa ooc oog ooo oop oos op- opa opc ope opg opo opp ops os- osa osc ose osg oso osp oss p-p paa pac pae pag pao pap pas pca pcc pce pcg pco pcp pcs pea pec pee peg peo pep pes pga pgc pge pgg pgo pgp pgs poa poc poe pog poo pop pos ppa ppc ppe ppg ppo ppp pps ps- psa psc pse psg pso psp pss saa sac sae sag sao sap sas sca scc sce scg sco scp scs se- sea sec see seg seo sep ses sga sgc sge sgg sgo sgp sgs soa soc soe sog soo sop sos spa spc spe spg spo spp sps ss- ssa ssc sse ssg sso ssp sss