-th a-a a-b a-t aaa aab aah aam aat ab- aba abb abh abm abt aha ahb ahh ahm aht ama amb amh amm amt at- ata atb ath atm att baa bab bah bam bat bba bbb bbh bbm bbt bha bhb bhh bhm bht bma bmb bmh bmm bmt bta btb bth btm btt haa hab hah ham hat hba hbb hbh hbm hbt hha hhb hhh hhm hht hma hmb hmh hmm hmt hta htb hth htm htt maa mab mah mam mat mba mbb mbh mbm mbt mha mhh mhm mht mma mmb mmh mmm mmt mta mtb mth mtm mtt taa tab tah tam tat tba tbb tbh tbm tbt th- tha thb thh thm tht tma tmb tmh tmm tmt tta ttb tth ttm ttt