a-a a-b a-t aaa aab aad aae aam aan aat ab- aba abb abd abe abm abn abt ad- ada adb add ade adm adn adt aea aeb aed aee aem aen aet ama amb amd ame amm amn amt an- ana anb and ane anm ann ant at- ata atb atd ate atm atn att baa bab bad bae bam ban bat bba bbb bbd bbe bbm bbn bbt bda bdb bdd bde bdm bdt be- bea beb bed bee bem ben bet bma bmb bmd bme bmm bmn bmt bna bnb bnd bne bnn bnt bta btb btd bte btm btn btt daa dab dad dae dam dan dat dba dbb dbd dbe dbm dbn dbt dda ddb ddd dde ddm ddn ddt de- dea deb ded dee dem den det dma dmb dmd dme dmm dmn dmt dna dnb dnd dne dnm dnn dnt dta dtb dtd dte dtm dtn dtt eaa eab ead eae eam ean eat eba ebb ebd ebe ebm ebn ebt ed- eda edb edd ede edm edn edt eea eeb eed eee eem een eet em- ema emb emd eme emm emn emt en- ena enb end ene enm enn ent eta etb etd ete etm etn ett maa mab mad mae mam man mat mba mbb mbd mbe mbm mbt mda mdb mdd mde mdm mdn mdt mea meb med mee mem men met mma mmb mmd mme mmm mmn mmt mna mnb mne mnm mnn mnt mta mtb mtd mte mtm mtn mtt naa nab nad nae nam nan nat nba nbb nbd nbe nbm nbn nbt nda ndb ndd nde ndm ndn ndt ne- nea neb ned nee nem nen net nma nmb nmd nme nmm nmn nmt nna nnb nne nnm nnn nnt nta ntb ntd nte ntm ntn ntt taa tab tad tae tam tan tat tba tbb tbd tbe tbm tbn tbt tda tdb tdd tde tdm tdn tdt te- tea teb ted tee tem ten tet tma tmb tmd tme tmm tmn tmt tna tnb tnd tne tnm tnn tnt tta ttb ttd tte ttm ttn ttt