a-a a-b a-t aaa aab aae aag aam aan aat ab- aba abb abe abg abm abn abt aea aeb aee aeg aem aen aet ag- aga agb age agg agm agn agt ama amb ame amg amm amn amt an- ana anb ane ang anm ann ant at- ata atb ate atg atm atn att baa bab bae bag bam ban bat bba bbb bbe bbg bbm bbn bbt be- bea beb bee beg bem ben bet bga bgb bge bgg bgm bgn bgt bma bmb bme bmg bmm bmn bmt bna bnb bne bng bnn bnt bta btb bte btg btm btn btt eaa eab eae eag eam ean eat eba ebb ebe ebg ebm ebn ebt eea eeb eee eeg eem een eet ega egb ege egg egm egn egt em- ema emb eme emg emm emn emt en- ena enb ene eng enm enn ent eta etb ete etg etm etn ett gaa gab gae gag gam gan gat gba gbe gbg gbm gbn gbt ge- gea geb gee geg gem gen get gga ggb ggg ggm ggn ggt gma gmb gme gmg gmm gmn gmt gna gnb gne gnm gnn gnt gta gtb gte gtg gtm gtn gtt maa mab mae mag mam man mat mba mbb mbe mbg mbm mbt mea meb mee meg mem men met mga mgb mge mgm mgn mgt mma mmb mme mmg mmm mmn mmt mna mnb mne mng mnm mnn mnt mta mtb mte mtg mtm mtn mtt naa nab nae nag nam nan nat nba nbb nbe nbg nbm nbn nbt ne- nea neb nee neg nem nen net nga ngb nge ngg ngm ngn ngt nma nmb nme nmg nmm nmn nmt nna nnb nne nng nnm nnn nnt nta ntb nte ntg ntm ntn ntt taa tab tae tag tam tan tat tba tbb tbe tbg tbm tbn tbt te- tea teb tee teg tem ten tet tga tgb tge tgg tgm tgn tgt tma tmb tme tmg tmm tmn tmt tna tnb tne tng tnm tnn tnt tta ttb tte ttg ttm ttn ttt