a-a a-c a-t aaa aac aad aat aau ac- aca acc acd act acu ad- ada adc add adt adu at- ata atc atd att atu au- aua auc aud aut c-- caa cac cad cat cau cca ccc ccd cct ccu cda cdc cdd cdt cdu cta ctc ctd ctt ctu cua cuc cud cut cuu daa dac dad dat dau dca dcc dcd dct dcu dda ddc ddd ddt ddu dta dtc dtd dtt dtu dua duc dud dut taa tac tad tat tau tca tcc tcd tct tcu tda tdc tdd tdt tdu tta ttc ttd ttt ttu tua tuc tud tut tuu ua- uaa uac uad uat uau uca ucc ucd uct ucu uda udc udd udt udu uta utc utd utt utu uua uuc uut uuu