a-a a-c a-t aaa aac aas aat aau ac- aca acc acs act acu as- asa asc ass ast asu at- ata atc ats att atu au- aua auc aus aut c-- caa cac cas cat cau cca ccc ccs cct ccu csa csc css cst csu cta ctc cts ctt ctu cua cuc cus cut cuu saa sac sas sat sau sca scc scs sct scu ss- ssa ssc sss sst ssu sta stc sts stt stu sua suc sus sut suu taa tac tas tat tau tca tcc tcs tct tcu tsa tsc tss tst tsu tta ttc tts ttt ttu tua tuc tus tut tuu ua- uaa uac uas uat uau uca ucc ucs uct ucu usa usc uss ust usu uta utc uts utt utu uua uuc uus uut uuu