a-a a-b a-t aaa aab aae aak aam aat ab- aba abb abe abk abm abt aea aeb aee aek aem aet aka akb ake akk akm ama amb ame amk amm amt at- ata atb ate atm att baa bab bae bak bam bat bba bbb bbe bbk bbm bbt be- bea beb bee bek bem bet bka bkb bke bkk bkm bkt bma bmb bme bmk bmm bmt bta btb bte btk btm btt eaa eab eae eak eam eat eba ebb ebe ebk ebm ebt eea eeb eee eek eem eet eka ekb eke ekt em- ema emb eme emk emm emt eta etb ete etk etm ett k-t ka- kaa kab kae kak kam kat kba kbb kbe kbk kbm ke- kea keb kee kek kem ket kkb kke kkk kkm kkt kma kmb kme kmk kmm kmt kta ktb kte ktk ktm ktt maa mab mae mak mam mat mba mbb mbe mbk mbm mbt mea meb mee mek mem met mka mkb mke mkk mkm mkt mma mmb mme mmk mmm mmt mta mtb mte mtk mtm mtt taa tab tae tak tam tat tba tbb tbe tbk tbm tbt te- tea teb tee tek tem tet tka tkb tke tkk tkm tkt tma tmb tme tmk tmm tmt tta ttb tte ttk ttm ttt