a-a a-b a-t aaa aab aae aam aao aap aas aat ab- aba abb abe abm abo abp abs abt aea aeb aee aem aeo aep aes aet ama amb ame amm amo amp ams amt aoa aob aoe aom aoo aop aos aot ap- apa apb ape apm apo app aps apt as- asa asb ase asm aso asp ass ast at- ata atb ate atm ato atp ats att b-p baa bab bae bam bao bap bas bat bba bbb bbe bbm bbo bbp bbs bbt be- bea beb bee bem beo bep bes bet bma bmb bme bmm bmo bmp bms bmt boa bob boe bom boo bop bos bot bpa bpb bpe bpm bpo bpp bps bpt bsa bsb bse bsm bso bsp bss bst bta btb bte btm bto btp bts btt eaa eab eae eam eao eap eas eat eba ebb ebe ebm ebo ebp ebs ebt eea eeb eee eem eeo eep ees eet em- ema emb eme emm emo emp ems emt eo- eoa eob eoe eom eoo eop eos eot ep- epa epb epe epm epo epp eps ept es- esa esb ese esm eso esp ess est eta etb ete etm eto etp ets ett m-o maa mab mae mam mao map mas mat mba mbb mbe mbm mbo mbp mbs mbt mea meb mee mem meo mep mes met mma mmb mme mmm mmo mmp mms mmt moa mob moe mom moo mop mos mot mpa mpb mpe mpm mpo mpp mps mpt msa msb mse msm mso msp mss mst mta mtb mte mtm mto mtp mts mtt oaa oab oae oam oao oap oas oat ob- oba obb obe obm obo obp obs obt oea oeb oee oem oeo oep oes oet om- oma omb ome omm omo omp oms omt oo- ooa oob oom ooo oop oos oot op- opa opb ope opm opo opp ops opt os- osa osb ose osm oso osp oss ost ot- ota otb ote otm oto otp ots ott p-p paa pab pae pam pao pap pas pat pba pbb pbe pbm pbo pbp pbs pbt pea peb pee pem peo pep pes pet pma pmb pme pmm pmo pmp pms pmt poa pob poe pom poo pop pos pot ppa ppb ppe ppm ppo ppp pps ppt ps- psa psb pse psm pso psp pss pst pt- pta ptb pte ptm pto ptp pts ptt saa sab sae sam sao sap sas sat sba sbb sbe sbm sbo sbp sbs sbt se- sea seb see sem seo sep ses set sma smb sme smm smo smp sms smt soa sob soe som soo sop sos sot spa spb spe spm spo spp sps spt ss- ssa ssb sse ssm sso ssp sss sst sta stb ste stm sto stp sts stt taa tab tae tam tao tap tas tat tba tbb tbe tbm tbo tbp tbs tbt te- tea teb tee tem teo tep tes tet tma tmb tme tmm tmo tmp tms tmt to- toa tob toe tom too top tos tot tpa tpb tpe tpm tpo tpp tps tpt tsa tsb tse tsm tso tsp tss tst tta ttb tte ttm tto ttp tts ttt