a-a a-t aaa aan aar aas aat an- ana ann anr ans ant ar- ara arn arr ars art as- asa asn asr ass ast at- ata atn atr ats att naa nan nar nas nat nna nnn nns nnt nra nrn nrr nrs nrt nsa nsn nsr nss nst nta ntn ntr nts ntt ra- raa ran rar ras rat rna rnn rnr rns rnt rra rrn rrr rrs rrt rsa rsn rsr rss rst rta rtn rtr rts rtt saa san sar sas sat sna snn snr sns snt sr- sra srn srr srs srt ss- ssa ssn ssr sss sst sta stn str sts stt taa tan tar tas tat tna tnn tnr tns tnt tra trn trr trs trt tsa tsn tsr tss tst tta ttn ttr tts ttt