a-a a-c aaa aac aae aag aan aap aas ac- aca acc ace acg acn acp acs aea aec aee aeg aen aep aes ag- aga agc age agg agn agp ags an- ana anc ane ang ann anp ans ap- apa apc ape apg apn app aps as- asa asc ase asg asn asp ass c-- caa cac cae cag can cap cas cca ccc cce ccg ccn ccp ccs ce- cea cec cee ceg cen cep ces cga cgc cge cgg cgn cgp cgs cn- cna cnc cne cng cnn cnp cns cpa cpc cpe cpg cpn cpp cps csa csc cse csg csn csp css eaa eac eae eag ean eap eas ec- eca ecc ece ecg ecn ecs eea eec eee eeg een eep ees ega egc ege egg egn egp egs en- ena enc ene eng enn enp ens ep- epa epc epe epg epn epp eps es- esa esc ese esg esn esp ess g-p gaa gac gae gag gan gap gas gca gcc gce gcg gcn gcp gcs ge- gea gec gee geg gen gep ges gga ggc ggg ggn ggp ggs gna gnc gne gnn gnp gns gpa gpc gpe gpg gpn gpp gps gsa gsc gse gsg gsn gsp gss naa nac nae nag nan nap nas nca ncc nce ncg ncn ncp ncs ne- nea nec nee neg nen nep nes nga ngc nge ngg ngn ngp ngs nna nnc nne nng nnn nnp nns npa npc npe npg npn npp nps nsa nsc nse nsg nsn nsp nss p-p paa pac pae pag pan pap pas pca pcc pce pcg pcn pcp pcs pea pec pee peg pen pep pes pga pgc pge pgg pgn pgp pgs pn- pna pnc pne png pnn pnp pns ppa ppc ppe ppg ppn ppp pps ps- psa psc pse psg psn psp pss saa sac sae sag san sap sas sca scc sce scg scn scp scs se- sea sec see seg sen sep ses sga sgc sge sgg sgn sgp sgs sna snc sne sng snn snp sns spa spc spe spg spn spp sps ss- ssa ssc sse ssg ssn ssp sss