a-a a-b a-t aaa aab aad aae aam aat ab- aba abb abd abe abm abt ad- ada adb add ade adm adt aea aeb aed aee aem aet ama amb amd ame amm amt at- ata atb atd ate atm att baa bab bad bae bam bat bba bbb bbd bbe bbm bbt bda bdb bdd bde bdm bdt be- bea beb bed bee bem bet bma bmb bmd bme bmm bmt bta btb btd bte btm btt daa dab dad dae dam dat dba dbb dbd dbe dbm dbt dda ddb ddd dde ddm ddt de- dea deb ded dee dem det dma dmb dmd dme dmm dmt dta dtb dtd dte dtm dtt eaa eab ead eae eam eat eba ebb ebd ebe ebm ebt ed- eda edb edd ede edm edt eea eeb eed eee eem eet em- ema emb emd eme emm emt eta etb etd ete etm ett maa mab mad mae mam mat mba mbb mbd mbe mbm mbt mda mdb mdd mde mdm mdt mea meb med mee mem met mma mmb mmd mme mmm mmt mta mtb mtd mte mtm mtt taa tab tad tae tam tat tba tbb tbd tbe tbm tbt tda tdb tdd tde tdm tdt te- tea teb ted tee tem tet tma tmb tmd tme tmm tmt tta ttb ttd tte ttm ttt