-er b-p bbb bbe bbm bbp bbr bbs bbt be- beb bee bem bep ber bes bet bmb bme bmm bmp bmr bms bmt bpb bpe bpm bpp bpr bps bpt brb bre brm brp brr brs brt bsb bse bsm bsp bsr bss bst btb bte btm btp btr bts btt ebb ebe ebm ebp ebr ebs ebt eeb eee eem eep eer ees eet em- emb eme emm emp emr ems emt ep- epb epe epm epp epr eps ept erb ere erm erp err ers ert es- esb ese esm esp esr ess est etb ete etm etp etr ets ett m-r mbb mbe mbm mbp mbr mbs mbt meb mee mem mep mer mes met mmb mme mmm mmp mmr mms mmt mpb mpe mpm mpp mpr mps mpt mrb mre mrm mrp mrr mrs mrt msb mse msm msp msr mss mst mtb mte mtm mtp mtr mts mtt p-p pbb pbe pbm pbp pbr pbs pbt peb pee pem pep per pes pet pmb pme pmm pmp pmr pms pmt ppb ppe ppm ppp ppr pps ppt prb pre prm prp prr prs prt ps- psb pse psm psp psr pss pst pt- ptb pte ptm ptp ptr pts ptt rbb rbe rbm rbp rbr rbs rbt re- reb ree rem rep rer res ret rmb rme rmm rmp rmr rms rmt rpb rpe rpm rpp rpr rps rpt rrb rrm rrp rrr rrs rrt rsb rse rsm rsp rsr rss rst rtb rte rtm rtp rtr rts rtt sbb sbe sbm sbp sbr sbs sbt se- seb see sem sep ser ses set smb sme smm smp smr sms smt spb spe spm spp spr sps spt sr- srb sre srm srp srr srs srt ss- ssb sse ssm ssp ssr sss sst stb ste stm stp str sts stt tbb tbe tbm tbp tbr tbs tbt te- teb tee tem tep ter tes tet tmb tme tmm tmp tmr tms tmt tpb tpe tpm tpp tpr tps tpt trb tre trm trp trr trs trt tsb tse tsm tsp tsr tss tst ttb tte ttm ttp ttr tts ttt