a-a a-t aaa aar aas aat aau ar- ara arr ars art aru as- asa asr ass ast asu at- ata atr ats att atu au- aua aur aus aut ra- raa rar ras rat rau rra rrr rrs rrt rru rsa rsr rss rst rsu rta rtr rts rtt rtu rua rur rus rut ruu saa sar sas sat sau sr- sra srr srs srt ss- ssa ssr sss sst ssu sta str sts stt stu sua sur sus sut suu taa tar tas tat tau tra trr trs trt tru tsa tsr tss tst tsu tta ttr tts ttt ttu tua tur tus tut tuu ua- uaa uar uas uat uau ur- ura urr urs urt uru usa usr uss ust usu uta utr uts utt utu uua uur uus uut uuu