-ey a-a a-c a-t aaa aac aae aan aat aax aay ac- aca acc ace acn act acx acy aea aec aee aen aet aex aey an- ana anc ane ann ant anx any at- ata atc ate atn att atx ax- axa axe axn axt axx ay- aya ayc aye ayn ayt ayx c-- caa cac cae can cat cax cay cca ccc cce ccn cct ccx ce- cea cec cee cen cet cex cey cn- cna cnc cne cnn cnt cnx cny cta ctc cte ctn ctt ctx cty cxc cxt cxx cya cyc cye cyn cyt eaa eac eae ean eat eax ec- eca ecc ece ecn ect ecx eea eec eee een eet eex eey en- ena enc ene enn ent eny eta etc ete etn ett etx ety ex- exa exc exe ext exx exy eya eyc eye eyn eyt naa nac nae nan nat nax nay nca ncc nce ncn nct ncx ne- nea nec nee nen net nex ney nna nnc nne nnn nnt nta ntc nte ntn ntt ntx nxc nxt nya nyc nye nyn nyt nyx nyy t-x taa tac tae tan tat tax tay tca tcc tce tcn tct tcx te- tea tec tee ten tet tex tey tna tnc tne tnn tnt tnx tta ttc tte ttn ttt ttx tty txe txn txt tya tyc tye tyn tyt xaa xac xan xat xcx xee xen xet xex xna xnc xtc xtx xty xxx xxy xyy yaa yac yae yan yat yax yay yca ycc yce ycy yea yec yee yen yet yex yey yna yne ynn yny yta ytc yte ytn ytt yxa yxe yxy yyc yye yyt yyy