a-a a-b a-i a-t aaa aab aae aai aam aan aat aax ab- aba abb abe abi abm abn abt abx aea aeb aee aei aem aen aet aex ai- aia aib aie aii aim ain ait aix ama amb ame ami amm amn amt amx an- ana anb ane ani anm ann ant anx at- ata atb ate ati atm atn att atx ax- axa axe axi axm axn axt axx baa bab bae bai bam ban bat bax bba bbb bbe bbi bbm bbn bbt bbx be- bea beb bee bei bem ben bet bex bi- bia bib bie bii bim bin bit bix bma bmb bme bmi bmm bmn bmt bmx bna bnb bne bni bnn bnt bnx bta btb bte bti btm btn btt btx bxb bxi bxm bxn bxx eaa eab eae eai eam ean eat eax eba ebb ebe ebi ebm ebn ebt ebx eea eeb eee eem een eet eex eia eib eie eii eim ein eit eix em- ema emb eme emi emm emn emt emx en- ena enb ene eni enm enn ent eta etb ete eti etm etn ett etx ex- exa exe exi ext exx ia- iaa iab iae iai iam ian iat iba ibb ibe ibi ibm ibn ibt ibx ie- iea iee iei iem ien iet iex iia iib iie iii iim iin iit iix im- ima imb ime imi imm imn imt imx in- ina inb ine ini inm inn int inx ita itb ite iti itm itn itt itx ixe ixi ixn maa mab mae mai mam man mat max mba mbb mbe mbi mbm mbt mbx mea meb mee mei mem men met mex mi- mia mib mie mii mim min mit mix mma mmb mme mmi mmm mmn mmt mmx mna mnb mne mni mnm mnn mnt mta mtb mte mti mtm mtn mtt mtx mxa mxi mxn n-i naa nab nae nai nam nan nat nax nba nbb nbe nbi nbm nbn nbt nbx ne- nea neb nee nei nem nen net nex nia nib nie nii nim nin nit nix nma nmb nme nmi nmm nmn nmt nna nnb nne nni nnm nnn nnt nta ntb nte nti ntm ntn ntt ntx nxt t-x taa tab tae tai tam tan tat tax tba tbb tbe tbi tbm tbn tbt te- tea teb tee tei tem ten tet tex tia tib tie tii tim tin tit tix tma tmb tme tmi tmm tmn tmt tmx tna tnb tne tni tnm tnn tnt tnx tta ttb tte tti ttm ttn ttt ttx txe txi txn txt xaa xam xan xat xbe xbx xee xem xen xet xex xia xie xii xin xit xix xma xmi xmm xmt xmx xna xti xtm xtx xxi xxx