a-a a-c aaa aac aag aar aas ac- aca acc acg acr acs ag- aga agc agg agr ags ar- ara arc arg arr ars as- asa asc asg asr ass c-- caa cac cag car cas cca ccc ccg ccr ccs cga cgc cgg cgr cgs cra crc crg crr crs csa csc csg csr css gaa gac gag gar gas gca gcc gcg gcr gcs gga ggc ggg ggr ggs gra grc grg grr grs gsa gsc gsg gsr gss ra- raa rac rag rar ras rca rcc rcg rcr rcs rga rgc rgg rgr rgs rra rrc rrg rrr rrs rsa rsc rsg rsr rss saa sac sag sar sas sca scc scg scr scs sga sgc sgg sgr sgs sr- sra src srg srr srs ss- ssa ssc ssg ssr sss