a-a a-b a-t aaa aab aam aap aas aat ab- aba abb abm abp abs abt ama amb amm amp ams amt ap- apa apb apm app aps apt as- asa asb asm asp ass ast at- ata atb atm atp ats att b-p baa bab bam bap bas bat bba bbb bbm bbp bbs bbt bma bmb bmm bmp bms bmt bpa bpb bpm bpp bps bpt bsa bsb bsm bsp bss bst bta btb btm btp bts btt maa mab mam map mas mat mba mbb mbm mbp mbs mbt mma mmb mmm mmp mms mmt mpa mpb mpm mpp mps mpt msa msb msm msp mss mst mta mtb mtm mtp mts mtt p-p paa pab pam pap pas pat pba pbb pbm pbp pbs pbt pma pmb pmm pmp pms pmt ppa ppb ppm ppp pps ppt ps- psa psb psm psp pss pst pt- pta ptb ptm ptp pts ptt saa sab sam sap sas sat sba sbb sbm sbp sbs sbt sma smb smm smp sms smt spa spb spm spp sps spt ss- ssa ssb ssm ssp sss sst sta stb stm stp sts stt taa tab tam tap tas tat tba tbb tbm tbp tbs tbt tma tmb tmm tmp tms tmt tpa tpb tpm tpp tps tpt tsa tsb tsm tsp tss tst tta ttb ttm ttp tts ttt