a-a a-c a-t aaa aac aao aas aat aau ac- aca acc aco acs act acu aoa aoc aoo aos aot aou as- asa asc aso ass ast asu at- ata atc ato ats att atu au- aua auc auo aus aut c-- caa cac cao cas cat cau cca ccc cco ccs cct ccu co- coa coc coo cos cot cou csa csc cso css cst csu cta ctc cto cts ctt ctu cua cuc cuo cus cut cuu oaa oac oao oas oat oau oc- oca occ oco ocs oct ocu oo- ooa ooc ooo oos oot os- osa osc oso oss ost osu ot- ota otc oto ots ott otu ou- oua ouc ouo ous out saa sac sao sas sat sau sca scc sco scs sct scu soa soc soo sos sot sou ss- ssa ssc sso sss sst ssu sta stc sto sts stt stu sua suc suo sus sut suu taa tac tao tas tat tau tca tcc tco tcs tct tcu to- toa toc too tos tot tou tsa tsc tso tss tst tsu tta ttc tto tts ttt ttu tua tuc tuo tus tut tuu ua- uaa uac uao uas uat uau uca ucc uco ucs uct ucu uoa uoc uoo uos uot usa usc uso uss ust usu uta utc uto uts utt utu uua uuc uus uut uuu