-er b-p bbb bbd bbe bbm bbo bbp bbr bbt bdb bdd bde bdm bdo bdp bdr bdt be- beb bed bee bem beo bep ber bet bmb bmd bme bmm bmo bmp bmr bmt bob bod boe bom boo bop bor bot bpb bpd bpe bpm bpo bpp bpr bpt brb brd bre brm bro brp brr brt btb btd bte btm bto btp btr btt dbb dbd dbe dbm dbo dbp dbr dbt ddb ddd dde ddm ddo ddp ddr ddt de- deb ded dee dem deo dep der det dmb dmd dme dmm dmo dmp dmr dmt dob dod doe dom doo dop dor dot dpb dpd dpe dpm dpo dpp dpr dpt drb drd dre drm dro drp drr drt dtb dtd dte dtm dto dtp dtr dtt ebb ebd ebe ebm ebo ebp ebr ebt ed- edb edd ede edm edo edp edr edt eeb eed eee eem eeo eep eer eet em- emb emd eme emm emo emp emr emt eo- eob eod eoe eom eoo eop eor eot ep- epb epd epe epm epo epp epr ept erb erd ere erm ero erp err ert etb etd ete etm eto etp etr ett m-o m-r mbb mbd mbe mbm mbo mbp mbr mbt mdb mdd mde mdm mdo mdp mdr mdt meb med mee mem meo mep mer met mmb mmd mme mmm mmo mmp mmr mmt mob mod moe mom moo mop mor mot mpb mpd mpe mpm mpo mpp mpr mpt mrb mrd mre mrm mro mrp mrr mrt mtb mtd mte mtm mto mtp mtr mtt ob- obb obd obe obm obo obp obr obt odb odd ode odm odo odp odr odt oeb oed oee oem oeo oep oer oet om- omb omd ome omm omo omp omr omt oo- oob ood oom ooo oop oor oot op- opb opd ope opm opo opp opr opt or- orb ord ore orm oro orp orr ort ot- otb otd ote otm oto otp otr ott p-p pbb pbd pbe pbm pbo pbp pbr pbt pdb pdd pde pdm pdo pdp pdr pdt peb ped pee pem peo pep per pet pmb pmd pme pmm pmo pmp pmr pmt pob pod poe pom poo pop por pot ppb ppd ppe ppm ppo ppp ppr ppt prb prd pre prm pro prp prr prt pt- ptb ptd pte ptm pto ptp ptr ptt rbb rbd rbe rbm rbo rbp rbr rbt rdb rdd rde rdm rdo rdp rdr rdt re- reb red ree rem reo rep rer ret rmb rmd rme rmm rmo rmp rmr rmt rob rod roe rom roo rop ror rot rpb rpd rpe rpm rpo rpp rpr rpt rrb rrd rrm rrp rrr rrt rtb rtd rte rtm rto rtp rtr rtt tbb tbd tbe tbm tbo tbp tbr tbt tdb tdd tde tdm tdo tdp tdr tdt te- teb ted tee tem teo tep ter tet tmb tmd tme tmm tmo tmp tmr tmt to- tob tod toe tom too top tor tot tpb tpd tpe tpm tpo tpp tpr tpt trb trd tre trm tro trp trr trt ttb ttd tte ttm tto ttp ttr ttt