a-a a-b aaa aab aah aam aan ab- aba abb abh abm abn aha ahb ahh ahm ahn ama amb amh amm amn an- ana anb anh anm ann baa bab bah bam ban bba bbb bbh bbm bbn bha bhb bhh bhm bma bmb bmh bmm bmn bna bnb bnn haa hab hah ham han hba hbb hbh hbm hbn hha hhb hhh hhm hhn hma hmb hmh hmm hna hnb hnh hnn maa mab mah mam man mba mbb mbh mbm mha mhh mhm mhn mma mmb mmh mmm mmn mna mnb mnm mnn naa nab nah nam nan nba nbb nbm nbn nha nhb nhh nhm nhn nma nmb nmh nmm nmn nna nnb nnh nnm nnn