a-a a-c a-t aaa aac aad aae aan aat aau aax ac- aca acc acd ace acn act acu acx ad- ada adc add ade adn adt adu adx aea aec aed aee aen aet aeu aex an- ana anc and ane ann ant anu anx at- ata atc atd ate atn att atu atx au- aua auc aud aue aun aut aux ax- axa axe axn axt axx c-- caa cac cad cae can cat cau cax cca ccc ccd cce ccn cct ccu ccx cda cdc cdd cde cdn cdt cdu cdx ce- cea cec ced cee cen cet ceu cex cn- cna cnc cnd cne cnn cnt cnu cnx cta ctc ctd cte ctn ctt ctu ctx cua cuc cud cue cun cut cuu cxc cxt cxx daa dac dad dae dan dat dau dax dca dcc dcd dce dcn dct dcu dcx dda ddc ddd dde ddn ddt ddu ddx de- dea dec ded dee den det deu dex dna dnc dnd dne dnn dnt dta dtc dtd dte dtn dtt dtu dtx dua duc dud due dun dut dux dxc dxd dxn dxt dxx eaa eac ead eae ean eat eau eax ec- eca ecc ecd ece ecn ect ecu ecx ed- eda edc edd ede edn edt edu edx eea eec eed eee een eet eex en- ena enc end ene enn ent enu eta etc etd ete etn ett etu etx eu- eua euc eud eue eun eut eux ex- exa exc exd exe ext exu exx naa nac nad nae nan nat nau nax nca ncc ncd nce ncn nct ncu ncx nda ndc ndd nde ndn ndt ndu ne- nea nec ned nee nen net neu nex nna nnc nne nnn nnt nnu nta ntc ntd nte ntn ntt ntu ntx nua nuc nud nue nun nut nuu nux nxc nxd nxt t-x taa tac tad tae tan tat tau tax tca tcc tcd tce tcn tct tcu tcx tda tdc tdd tde tdn tdt tdu tdx te- tea tec ted tee ten tet teu tex tna tnc tnd tne tnn tnt tnx tta ttc ttd tte ttn ttt ttu ttx tua tuc tud tue tun tut tuu tux txe txn txt txu ua- uaa uac uad uae uan uat uau uca ucc ucd uce ucn uct ucu uda udc udd ude udn udt udu udx uea uec ued uee uen uet un- una unc und une unn unt unu unx uta utc utd ute utn utt utu utx uua uuc uue uun uut uuu uxc uxt uxu xaa xac xad xan xat xau xcd xcx xda xdc xde xdt xed xee xen xet xeu xex xna xnc xnu xtc xtx xue xun xxx