a-a a-t aaa aad aar aas aat ad- ada add adr ads adt ar- ara ard arr ars art as- asa asd asr ass ast at- ata atd atr ats att daa dad dar das dat dda ddd ddr dds ddt dra drd drr drs drt dsa dsd dsr dss dst dta dtd dtr dts dtt ra- raa rad rar ras rat rda rdd rdr rds rdt rra rrd rrr rrs rrt rsa rsd rsr rss rst rta rtd rtr rts rtt saa sad sar sas sat sda sdd sdr sds sdt sr- sra srd srr srs srt ss- ssa ssd ssr sss sst sta std str sts stt taa tad tar tas tat tda tdd tdr tds tdt tra trd trr trs trt tsa tsd tsr tss tst tta ttd ttr tts ttt