-th a-a a-b a-t aaa aab aah aam aao aat ab- aba abb abh abm abo abt aha ahb ahh ahm aho aht ama amb amh amm amo amt aoa aob aoh aom aoo aot at- ata atb ath atm ato att baa bab bah bam bao bat bba bbb bbh bbm bbo bbt bha bhb bhh bhm bho bht bma bmb bmh bmm bmo bmt boa bob boh bom boo bot bta btb bth btm bto btt haa hab hah ham hao hat hba hbb hbh hbm hbo hbt hha hhb hhh hhm hho hht hma hmb hmh hmm hmo hmt hoa hob hoh hom hoo hot hta htb hth htm hto htt m-o maa mab mah mam mao mat mba mbb mbh mbm mbo mbt mha mhh mhm mho mht mma mmb mmh mmm mmo mmt moa mob moh mom moo mot mta mtb mth mtm mto mtt oaa oab oah oam oao oat ob- oba obb obh obm obo obt oha ohh ohm oho oht om- oma omb omh omm omo omt oo- ooa oob ooh oom ooo oot ot- ota otb oth otm oto ott taa tab tah tam tao tat tba tbb tbh tbm tbo tbt th- tha thb thh thm tho tht tma tmb tmh tmm tmo tmt to- toa tob toh tom too tot tta ttb tth ttm tto ttt