a-a a-b a-t aaa aab aam aao aap aas aat ab- aba abb abm abo abp abs abt ama amb amm amo amp ams amt aoa aob aom aoo aop aos aot ap- apa apb apm apo app aps apt as- asa asb asm aso asp ass ast at- ata atb atm ato atp ats att b-p baa bab bam bao bap bas bat bba bbb bbm bbo bbp bbs bbt bma bmb bmm bmo bmp bms bmt boa bob bom boo bop bos bot bpa bpb bpm bpo bpp bps bpt bsa bsb bsm bso bsp bss bst bta btb btm bto btp bts btt m-o maa mab mam mao map mas mat mba mbb mbm mbo mbp mbs mbt mma mmb mmm mmo mmp mms mmt moa mob mom moo mop mos mot mpa mpb mpm mpo mpp mps mpt msa msb msm mso msp mss mst mta mtb mtm mto mtp mts mtt oaa oab oam oao oap oas oat ob- oba obb obm obo obp obs obt om- oma omb omm omo omp oms omt oo- ooa oob oom ooo oop oos oot op- opa opb opm opo opp ops opt os- osa osb osm oso osp oss ost ot- ota otb otm oto otp ots ott p-p paa pab pam pao pap pas pat pba pbb pbm pbo pbp pbs pbt pma pmb pmm pmo pmp pms pmt poa pob pom poo pop pos pot ppa ppb ppm ppo ppp pps ppt ps- psa psb psm pso psp pss pst pt- pta ptb ptm pto ptp pts ptt saa sab sam sao sap sas sat sba sbb sbm sbo sbp sbs sbt sma smb smm smo smp sms smt soa sob som soo sop sos sot spa spb spm spo spp sps spt ss- ssa ssb ssm sso ssp sss sst sta stb stm sto stp sts stt taa tab tam tao tap tas tat tba tbb tbm tbo tbp tbs tbt tma tmb tmm tmo tmp tms tmt to- toa tob tom too top tos tot tpa tpb tpm tpo tpp tps tpt tsa tsb tsm tso tsp tss tst tta ttb ttm tto ttp tts ttt