a-a a-c a-t aaa aac aae aan aas aat aau aax ac- aca acc ace acn acs act acu acx aea aec aee aen aes aet aeu aex an- ana anc ane ann ans ant anu anx as- asa asc ase asn ass ast asu asx at- ata atc ate atn ats att atu atx au- aua auc aue aun aus aut aux ax- axa axe axn axs axt axx c-- caa cac cae can cas cat cau cax cca ccc cce ccn ccs cct ccu ccx ce- cea cec cee cen ces cet ceu cex cn- cna cnc cne cnn cns cnt cnu cnx csa csc cse csn css cst csu csx cta ctc cte ctn cts ctt ctu ctx cua cuc cue cun cus cut cuu cxc cxs cxt cxx eaa eac eae ean eas eat eau eax ec- eca ecc ece ecn ecs ect ecu ecx eea eec eee een ees eet eex en- ena enc ene enn ens ent enu es- esa esc ese esn ess est esu esx eta etc ete etn ets ett etu etx eu- eua euc eue eun eus eut eux ex- exa exc exe exs ext exu exx naa nac nae nan nas nat nau nax nca ncc nce ncn ncs nct ncu ncx ne- nea nec nee nen nes net neu nex nna nnc nne nnn nns nnt nnu nsa nsc nse nsn nss nst nsu nsx nta ntc nte ntn nts ntt ntu ntx nua nuc nue nun nus nut nuu nux nxc nxt saa sac sae san sas sat sau sax sca scc sce scn scs sct scu scx se- sea sec see sen ses set seu sex sna snc sne snn sns snt snu ss- ssa ssc sse ssn sss sst ssu ssx sta stc ste stn sts stt stu stx sua suc sue sun sus sut suu sux sxc sxn sxs sxt sxu t-x taa tac tae tan tas tat tau tax tca tcc tce tcn tcs tct tcu tcx te- tea tec tee ten tes tet teu tex tna tnc tne tnn tns tnt tnx tsa tsc tse tsn tss tst tsu tsx tta ttc tte ttn tts ttt ttu ttx tua tuc tue tun tus tut tuu tux txe txn txs txt txu ua- uaa uac uae uan uas uat uau uca ucc uce ucn ucs uct ucu uea uec uee uen ues uet un- una unc une unn uns unt unu unx usa usc use usn uss ust usu usx uta utc ute utn uts utt utu utx uua uuc uue uun uus uut uuu uxc uxt uxu xaa xac xan xas xat xau xcx xee xen xes xet xeu xex xna xnc xns xnu xsa xsc xss xst xtc xts xtx xue xun xus xxx