a-a a-b a-t aaa aab aam aao aap aat ab- aba abb abm abo abp abt ama amb amm amo amp amt aoa aob aom aoo aop aot ap- apa apb apm apo app apt at- ata atb atm ato atp att b-p baa bab bam bao bap bat bba bbb bbm bbo bbp bbt bma bmb bmm bmo bmp bmt boa bob bom boo bop bot bpa bpb bpm bpo bpp bpt bta btb btm bto btp btt m-o maa mab mam mao map mat mba mbb mbm mbo mbp mbt mma mmb mmm mmo mmp mmt moa mob mom moo mop mot mpa mpb mpm mpo mpp mpt mta mtb mtm mto mtp mtt oaa oab oam oao oap oat ob- oba obb obm obo obp obt om- oma omb omm omo omp omt oo- ooa oob oom ooo oop oot op- opa opb opm opo opp opt ot- ota otb otm oto otp ott p-p paa pab pam pao pap pat pba pbb pbm pbo pbp pbt pma pmb pmm pmo pmp pmt poa pob pom poo pop pot ppa ppb ppm ppo ppp ppt pt- pta ptb ptm pto ptp ptt taa tab tam tao tap tat tba tbb tbm tbo tbp tbt tma tmb tmm tmo tmp tmt to- toa tob tom too top tot tpa tpb tpm tpo tpp tpt tta ttb ttm tto ttp ttt