a-a a-b a-t aaa aab aam aao aap aar aas aat ab- aba abb abm abo abp abr abs abt ama amb amm amo amp amr ams amt aoa aob aom aoo aop aor aos aot ap- apa apb apm apo app apr aps apt ar- ara arb arm aro arp arr ars art as- asa asb asm aso asp asr ass ast at- ata atb atm ato atp atr ats att b-p baa bab bam bao bap bar bas bat bba bbb bbm bbo bbp bbr bbs bbt bma bmb bmm bmo bmp bmr bms bmt boa bob bom boo bop bor bos bot bpa bpb bpm bpo bpp bpr bps bpt bra brb brm bro brp brr brs brt bsa bsb bsm bso bsp bsr bss bst bta btb btm bto btp btr bts btt m-o m-r maa mab mam mao map mar mas mat mba mbb mbm mbo mbp mbr mbs mbt mma mmb mmm mmo mmp mmr mms mmt moa mob mom moo mop mor mos mot mpa mpb mpm mpo mpp mpr mps mpt mra mrb mrm mro mrp mrr mrs mrt msa msb msm mso msp msr mss mst mta mtb mtm mto mtp mtr mts mtt oaa oab oam oao oap oar oas oat ob- oba obb obm obo obp obr obs obt om- oma omb omm omo omp omr oms omt oo- ooa oob oom ooo oop oor oos oot op- opa opb opm opo opp opr ops opt or- ora orb orm oro orp orr ors ort os- osa osb osm oso osp osr oss ost ot- ota otb otm oto otp otr ots ott p-p paa pab pam pao pap par pas pat pba pbb pbm pbo pbp pbr pbs pbt pma pmb pmm pmo pmp pmr pms pmt poa pob pom poo pop por pos pot ppa ppb ppm ppo ppp ppr pps ppt pra prb prm pro prp prr prs prt ps- psa psb psm pso psp psr pss pst pt- pta ptb ptm pto ptp ptr pts ptt ra- raa rab ram rao rap rar ras rat rba rbb rbm rbo rbp rbr rbs rbt rma rmb rmm rmo rmp rmr rms rmt roa rob rom roo rop ror ros rot rpa rpb rpm rpo rpp rpr rps rpt rra rrb rrm rrp rrr rrs rrt rsa rsb rsm rso rsp rsr rss rst rta rtb rtm rto rtp rtr rts rtt saa sab sam sao sap sar sas sat sba sbb sbm sbo sbp sbr sbs sbt sma smb smm smo smp smr sms smt soa sob som soo sop sor sos sot spa spb spm spo spp spr sps spt sr- sra srb srm sro srp srr srs srt ss- ssa ssb ssm sso ssp ssr sss sst sta stb stm sto stp str sts stt taa tab tam tao tap tar tas tat tba tbb tbm tbo tbp tbr tbs tbt tma tmb tmm tmo tmp tmr tms tmt to- toa tob tom too top tor tos tot tpa tpb tpm tpo tpp tpr tps tpt tra trb trm tro trp trr trs trt tsa tsb tsm tso tsp tsr tss tst tta ttb ttm tto ttp ttr tts ttt