a-a a-c aaa aac aag aan aar aas ac- aca acc acg acn acr acs ag- aga agc agg agn agr ags an- ana anc ang ann anr ans ar- ara arc arg arn arr ars as- asa asc asg asn asr ass c-- caa cac cag can car cas cca ccc ccg ccn ccr ccs cga cgc cgg cgn cgr cgs cn- cna cnc cng cnn cnr cns cra crc crg crn crr crs csa csc csg csn csr css gaa gac gag gan gar gas gca gcc gcg gcn gcr gcs gga ggc ggg ggn ggr ggs gna gnc gnn gnr gns gra grc grg grn grr grs gsa gsc gsg gsn gsr gss naa nac nag nan nar nas nca ncc ncg ncn ncr ncs nga ngc ngg ngn ngs nna nnc nng nnn nns nra nrc nrg nrn nrr nrs nsa nsc nsg nsn nsr nss ra- raa rac rag ran rar ras rca rcc rcg rcn rcr rcs rga rgc rgg rgn rgr rgs rna rnc rng rnn rnr rns rra rrc rrg rrn rrr rrs rsa rsc rsg rsn rsr rss saa sac sag san sar sas sca scc scg scn scr scs sga sgc sgg sgn sgr sgs sna snc sng snn snr sns sr- sra src srg srn srr srs ss- ssa ssc ssg ssn ssr sss