-er b-p bbb bbd bbe bbm bbo bbp bbr bdb bdd bde bdm bdo bdp bdr be- beb bed bee bem beo bep ber bmb bmd bme bmm bmo bmp bmr bob bod boe bom boo bop bor bpb bpd bpe bpm bpo bpp bpr brb brd bre brm bro brp brr dbb dbd dbe dbm dbo dbp dbr ddb ddd dde ddm ddo ddp ddr de- deb ded dee dem deo dep der dmb dmd dme dmm dmo dmp dmr dob dod doe dom doo dop dor dpb dpd dpe dpm dpo dpp dpr drb drd dre drm dro drp drr ebb ebd ebe ebm ebo ebp ebr ed- edb edd ede edm edo edp edr eeb eed eee eem eeo eep eer em- emb emd eme emm emo emp emr eo- eob eod eoe eom eoo eop eor ep- epb epd epe epm epo epp epr erb erd ere erm ero erp err m-o m-r mbb mbd mbe mbm mbo mbp mbr mdb mdd mde mdm mdo mdp mdr meb med mee mem meo mep mer mmb mmd mme mmm mmo mmp mmr mob mod moe mom moo mop mor mpb mpd mpe mpm mpo mpp mpr mrb mrd mre mrm mro mrp mrr ob- obb obd obe obm obo obp obr odb odd ode odm odo odp odr oeb oed oee oem oeo oep oer om- omb omd ome omm omo omp omr oo- oob ood oom ooo oop oor op- opb opd ope opm opo opp opr or- orb ord ore orm oro orp orr p-p pbb pbd pbe pbm pbo pbp pbr pdb pdd pde pdm pdo pdp pdr peb ped pee pem peo pep per pmb pmd pme pmm pmo pmp pmr pob pod poe pom poo pop por ppb ppd ppe ppm ppo ppp ppr prb prd pre prm pro prp prr rbb rbd rbe rbm rbo rbp rbr rdb rdd rde rdm rdo rdp rdr re- reb red ree rem reo rep rer rmb rmd rme rmm rmo rmp rmr rob rod roe rom roo rop ror rpb rpd rpe rpm rpo rpp rpr rrb rrd rrm rrp rrr