a-a a-t aaa aad aag aas aat ad- ada add adg ads adt ag- aga agd agg ags agt as- asa asd asg ass ast at- ata atd atg ats att daa dad dag das dat dda ddd ddg dds ddt dga dgd dgg dgs dgt dsa dsd dsg dss dst dta dtd dtg dts dtt g-d gaa gad gag gas gat gda gdd gds gdt gga ggd ggg ggs ggt gsa gsd gsg gss gst gta gtd gtg gts gtt saa sad sag sas sat sda sdd sdg sds sdt sga sgd sgg sgs sgt ss- ssa ssd ssg sss sst sta std stg sts stt taa tad tag tas tat tda tdd tdg tds tdt tga tgg tgs tgt tsa tsd tsg tss tst tta ttd ttg tts ttt