a-a a-c a-t aaa aac aae aat aau aax ac- aca acc ace act acu acx aea aec aee aet aeu aex at- ata atc ate att atu atx au- aua auc aue aut aux ax- axa axe axt axx c-- caa cac cae cat cau cax cca ccc cce cct ccu ccx ce- cea cec cee cet ceu cex cta ctc cte ctt ctu ctx cua cuc cue cut cuu cxc cxt cxx eaa eac eae eat eau eax ec- eca ecc ece ect ecu ecx eea eec eee eet eex eta etc ete ett etu etx eu- eua euc eue eut eux ex- exa exc exe ext exu exx t-x taa tac tae tat tau tax tca tcc tce tct tcu tcx te- tea tec tee tet teu tex tta ttc tte ttt ttu ttx tua tuc tue tut tuu tux txe txt txu ua- uaa uac uae uat uau uca ucc uce uct ucu uea uec uee uet uta utc ute utt utu utx uua uuc uue uut uuu uxc uxt uxu xaa xac xat xau xcx xee xet xeu xex xtc xtx xue xxx