a-a a-b aaa aab aad aae aag aam aan ab- aba abb abd abe abg abm abn ad- ada adb add ade adg adm adn aea aeb aed aee aeg aem aen ag- aga agb agd age agg agm agn ama amb amd ame amg amm amn an- ana anb and ane ang anm ann baa bab bad bae bag bam ban bba bbb bbd bbe bbg bbm bbn bda bdb bdd bde bdg bdm be- bea beb bed bee beg bem ben bga bgb bgd bge bgg bgm bgn bma bmb bmd bme bmg bmm bmn bna bnb bnd bne bng bnn daa dab dad dae dag dam dan dba dbb dbd dbe dbg dbm dbn dda ddb ddd dde ddg ddm ddn de- dea deb ded dee deg dem den dga dgd dge dgg dgm dgn dma dmb dmd dme dmg dmm dmn dna dnb dnd dne dng dnm dnn eaa eab ead eae eag eam ean eba ebb ebd ebe ebg ebm ebn ed- eda edb edd ede edg edm edn eea eeb eed eee eeg eem een ega egb egd ege egg egm egn em- ema emb emd eme emg emm emn en- ena enb end ene eng enm enn g-d gaa gab gad gae gag gam gan gba gbd gbe gbg gbm gbn gda gdb gdd gde gdm gdn ge- gea geb ged gee geg gem gen gga ggb ggd ggg ggm ggn gma gmb gmd gme gmg gmm gmn gna gnb gnd gne gnm gnn maa mab mad mae mag mam man mba mbb mbd mbe mbg mbm mda mdb mdd mde mdg mdm mdn mea meb med mee meg mem men mga mgb mgd mge mgm mgn mma mmb mmd mme mmg mmm mmn mna mnb mne mng mnm mnn naa nab nad nae nag nam nan nba nbb nbd nbe nbg nbm nbn nda ndb ndd nde ndg ndm ndn ne- nea neb ned nee neg nem nen nga ngb ngd nge ngg ngm ngn nma nmb nmd nme nmg nmm nmn nna nnb nne nng nnm nnn