a-a a-b aaa aab aag aah aam aan ab- aba abb abg abh abm abn ag- aga agb agg agh agm agn aha ahb ahg ahh ahm ahn ama amb amg amh amm amn an- ana anb ang anh anm ann baa bab bag bah bam ban bba bbb bbg bbh bbm bbn bga bgb bgg bgh bgm bgn bha bhb bhg bhh bhm bma bmb bmg bmh bmm bmn bna bnb bng bnn gaa gab gag gah gam gan gba gbg gbh gbm gbn gga ggb ggg ggh ggm ggn gha ghb ghg ghh ghn gma gmb gmg gmh gmm gmn gna gnb gnm gnn haa hab hag hah ham han hba hbb hbg hbh hbm hbn hga hgb hgg hgh hgm hgn hha hhb hhg hhh hhm hhn hma hmb hmg hmh hmm hna hnb hng hnh hnn maa mab mag mah mam man mba mbb mbg mbh mbm mga mgb mgh mgm mgn mha mhg mhh mhm mhn mma mmb mmg mmh mmm mmn mna mnb mng mnm mnn naa nab nag nah nam nan nba nbb nbg nbm nbn nga ngb ngg ngh ngm ngn nha nhb nhg nhh nhm nhn nma nmb nmg nmh nmm nmn nna nnb nng nnh nnm nnn