a-a a-b a-t aaa aab aam aap aat ab- aba abb abm abp abt ama amb amm amp amt ap- apa apb apm app apt at- ata atb atm atp att b-p baa bab bam bap bat bba bbb bbm bbp bbt bma bmb bmm bmp bmt bpa bpb bpm bpp bpt bta btb btm btp btt maa mab mam map mat mba mbb mbm mbp mbt mma mmb mmm mmp mmt mpa mpb mpm mpp mpt mta mtb mtm mtp mtt p-p paa pab pam pap pat pba pbb pbm pbp pbt pma pmb pmm pmp pmt ppa ppb ppm ppp ppt pt- pta ptb ptm ptp ptt taa tab tam tap tat tba tbb tbm tbp tbt tma tmb tmm tmp tmt tpa tpb tpm tpp tpt tta ttb ttm ttp ttt