a-a a-c a-t aaa aac aae aam aan aat aax ac- aca acc ace acm acn act acx aea aec aee aem aen aet aex ama amc ame amm amn amt amx an- ana anc ane anm ann ant anx at- ata atc ate atm atn att atx ax- axa axe axm axn axt axx c-- caa cac cae cam can cat cax cca ccc cce ccm ccn cct ccx ce- cea cec cee cem cen cet cex cma cmc cme cmm cmn cmt cmx cn- cna cnc cne cnm cnn cnt cnx cta ctc cte ctm ctn ctt ctx cxc cxt cxx eaa eac eae eam ean eat eax ec- eca ecc ece ecm ecn ect ecx eea eec eee eem een eet eex em- ema emc eme emm emn emt emx en- ena enc ene enm enn ent eta etc ete etm etn ett etx ex- exa exc exe ext exx maa mac mae mam man mat max mc- mca mcc mce mcm mcn mct mcx mea mec mee mem men met mex mma mmc mme mmm mmn mmt mmx mna mnc mne mnm mnn mnt mta mtc mte mtm mtn mtt mtx mxa mxc mxn naa nac nae nam nan nat nax nca ncc nce ncm ncn nct ncx ne- nea nec nee nem nen net nex nma nmc nme nmm nmn nmt nna nnc nne nnm nnn nnt nta ntc nte ntm ntn ntt ntx nxc nxt t-x taa tac tae tam tan tat tax tca tcc tce tcm tcn tct tcx te- tea tec tee tem ten tet tex tma tmc tme tmm tmn tmt tmx tna tnc tne tnm tnn tnt tnx tta ttc tte ttm ttn ttt ttx txe txn txt xaa xac xam xan xat xcx xee xem xen xet xex xma xmc xmm xmt xmx xna xnc xtc xtm xtx xxx