a-a a-c a-t aaa aac aar aas aat aau ac- aca acc acr acs act acu ar- ara arc arr ars art aru as- asa asc asr ass ast asu at- ata atc atr ats att atu au- aua auc aur aus aut c-- caa cac car cas cat cau cca ccc ccr ccs cct ccu cra crc crr crs crt cru csa csc csr css cst csu cta ctc ctr cts ctt ctu cua cuc cur cus cut cuu ra- raa rac rar ras rat rau rca rcc rcr rcs rct rcu rra rrc rrr rrs rrt rru rsa rsc rsr rss rst rsu rta rtc rtr rts rtt rtu rua ruc rur rus rut ruu saa sac sar sas sat sau sca scc scr scs sct scu sr- sra src srr srs srt ss- ssa ssc ssr sss sst ssu sta stc str sts stt stu sua suc sur sus sut suu taa tac tar tas tat tau tca tcc tcr tcs tct tcu tra trc trr trs trt tru tsa tsc tsr tss tst tsu tta ttc ttr tts ttt ttu tua tuc tur tus tut tuu ua- uaa uac uar uas uat uau uca ucc ucr ucs uct ucu ur- ura urc urr urs urt uru usa usc usr uss ust usu uta utc utr uts utt utu uua uuc uur uus uut uuu