a-a a-b aaa aab aad aag aam aan ab- aba abb abd abg abm abn ad- ada adb add adg adm adn ag- aga agb agd agg agm agn ama amb amd amg amm amn an- ana anb and ang anm ann baa bab bad bag bam ban bba bbb bbd bbg bbm bbn bda bdb bdd bdg bdm bga bgb bgd bgg bgm bgn bma bmb bmd bmg bmm bmn bna bnb bnd bng bnn daa dab dad dag dam dan dba dbb dbd dbg dbm dbn dda ddb ddd ddg ddm ddn dga dgd dgg dgm dgn dma dmb dmd dmg dmm dmn dna dnb dnd dng dnm dnn g-d gaa gab gad gag gam gan gba gbd gbg gbm gbn gda gdb gdd gdm gdn gga ggb ggd ggg ggm ggn gma gmb gmd gmg gmm gmn gna gnb gnd gnm gnn maa mab mad mag mam man mba mbb mbd mbg mbm mda mdb mdd mdg mdm mdn mga mgb mgd mgm mgn mma mmb mmd mmg mmm mmn mna mnb mng mnm mnn naa nab nad nag nam nan nba nbb nbd nbg nbm nbn nda ndb ndd ndg ndm ndn nga ngb ngd ngg ngm ngn nma nmb nmd nmg nmm nmn nna nnb nng nnm nnn