a-a a-c a-t aaa aac aan aat aau aax ac- aca acc acn act acu acx an- ana anc ann ant anu anx at- ata atc atn att atu atx au- aua auc aun aut aux ax- axa axn axt axx c-- caa cac can cat cau cax cca ccc ccn cct ccu ccx cn- cna cnc cnn cnt cnu cnx cta ctc ctn ctt ctu ctx cua cuc cun cut cuu cxc cxt cxx naa nac nan nat nau nax nca ncc ncn nct ncu ncx nna nnc nnn nnt nnu nta ntc ntn ntt ntu ntx nua nuc nun nut nuu nux nxc nxt t-x taa tac tan tat tau tax tca tcc tcn tct tcu tcx tna tnc tnn tnt tnx tta ttc ttn ttt ttu ttx tua tuc tun tut tuu tux txn txt txu ua- uaa uac uan uat uau uca ucc ucn uct ucu un- una unc unn unt unu unx uta utc utn utt utu utx uua uuc uun uut uuu uxc uxt uxu xaa xac xan xat xau xcx xna xnc xnu xtc xtx xun xxx