-er -up b-p b-u bbb bbe bbm bbp bbr bbt bbu be- beb bee bem bep ber bet beu bmb bme bmm bmp bmr bmt bmu bpb bpe bpm bpp bpr bpt bpu brb bre brm brp brr brt bru btb bte btm btp btr btt btu bub bue bum bup bur but buu ebb ebe ebm ebp ebr ebt ebu eeb eee eem eep eer eet em- emb eme emm emp emr emt emu ep- epb epe epm epp epr ept epu erb ere erm erp err ert eru etb ete etm etp etr ett etu eu- eub eue eup eur eut m-r mbb mbe mbm mbp mbr mbt mbu meb mee mem mep mer met meu mmb mme mmm mmp mmr mmt mmu mpb mpe mpm mpp mpr mpt mpu mrb mre mrm mrp mrr mrt mru mtb mte mtm mtp mtr mtt mtu mub mue mum mup mur mut muu p-p pbb pbe pbm pbp pbr pbt pbu peb pee pem pep per pet peu pmb pme pmm pmp pmr pmt pmu ppb ppe ppm ppp ppr ppt ppu prb pre prm prp prr prt pru pt- ptb pte ptm ptp ptr ptt ptu pub pue pum pup pur put puu rbb rbe rbm rbp rbr rbt rbu re- reb ree rem rep rer ret reu rmb rme rmm rmp rmr rmt rpb rpe rpm rpp rpr rpt rpu rrb rrm rrp rrr rrt rru rtb rte rtm rtp rtr rtt rtu rub rue rum rup rur rut ruu tbb tbe tbm tbp tbr tbt tbu te- teb tee tem tep ter tet teu tmb tme tmm tmp tmr tmt tmu tpb tpe tpm tpp tpr tpt tpu trb tre trm trp trr trt tru ttb tte ttm ttp ttr ttt ttu tub tue tum tup tur tut tuu ubb ube ubp ubr ubt ubu ueb uee uem uep uer uet um- umb ume umm ump umr umt umu up- upb upe upm upp upr upt upu ur- urb ure urm urp urr urt uru utb ute utm utp utr utt utu uue uum uur uut uuu