a-a a-t aaa aag aar aas aat ag- aga agg agr ags agt ar- ara arg arr ars art as- asa asg asr ass ast at- ata atg atr ats att gaa gag gar gas gat gga ggg ggr ggs ggt gra grg grr grs grt gsa gsg gsr gss gst gta gtg gtr gts gtt ra- raa rag rar ras rat rga rgg rgr rgs rgt rra rrg rrr rrs rrt rsa rsg rsr rss rst rta rtg rtr rts rtt saa sag sar sas sat sga sgg sgr sgs sgt sr- sra srg srr srs srt ss- ssa ssg ssr sss sst sta stg str sts stt taa tag tar tas tat tga tgg tgr tgs tgt tra trg trr trs trt tsa tsg tsr tss tst tta ttg ttr tts ttt