a-a a-b a-t aaa aab aae aag aam aat ab- aba abb abe abg abm abt aea aeb aee aeg aem aet ag- aga agb age agg agm agt ama amb ame amg amm amt at- ata atb ate atg atm att baa bab bae bag bam bat bba bbb bbe bbg bbm bbt be- bea beb bee beg bem bet bga bgb bge bgg bgm bgt bma bmb bme bmg bmm bmt bta btb bte btg btm btt eaa eab eae eag eam eat eba ebb ebe ebg ebm ebt eea eeb eee eeg eem eet ega egb ege egg egm egt em- ema emb eme emg emm emt eta etb ete etg etm ett gaa gab gae gag gam gat gba gbe gbg gbm gbt ge- gea geb gee geg gem get gga ggb ggg ggm ggt gma gmb gme gmg gmm gmt gta gtb gte gtg gtm gtt maa mab mae mag mam mat mba mbb mbe mbg mbm mbt mea meb mee meg mem met mga mgb mge mgm mgt mma mmb mme mmg mmm mmt mta mtb mte mtg mtm mtt taa tab tae tag tam tat tba tbb tbe tbg tbm tbt te- tea teb tee teg tem tet tga tgb tge tgg tgm tgt tma tmb tme tmg tmm tmt tta ttb tte ttg ttm ttt