-er b-p bbb bbd bbe bbg bbo bbp bbr bbt bdb bdd bde bdg bdo bdp bdr bdt be- beb bed bee beg beo bep ber bet bgb bgd bge bgg bgo bgp bgr bgt bob bod boe bog boo bop bor bot bpb bpd bpe bpg bpo bpp bpr bpt brb brd bre brg bro brp brr brt btb btd bte btg bto btp btr btt dbb dbd dbe dbg dbo dbp dbr dbt ddb ddd dde ddg ddo ddp ddr ddt de- deb ded dee deg deo dep der det dgd dge dgg dgp dgr dgt dob dod doe dog doo dop dor dot dpb dpd dpe dpg dpo dpp dpr dpt drb drd dre drg dro drp drr drt dtb dtd dte dtg dto dtp dtr dtt ebb ebd ebe ebg ebo ebp ebr ebt ed- edb edd ede edg edo edp edr edt eeb eed eee eeg eeo eep eer eet egb egd ege egg ego egp egr egt eo- eob eod eoe eog eoo eop eor eot ep- epb epd epe epg epo epp epr ept erb erd ere erg ero erp err ert etb etd ete etg eto etp etr ett g-d g-p gbd gbe gbg gbo gbp gbr gbt gdb gdd gde gdo gdp gdr gdt ge- geb ged gee geg geo gep ger get ggb ggd ggg ggo ggp ggr ggt gob god goe gog goo gop gor got gpb gpd gpe gpg gpo gpp gpr gpt grb grd gre grg gro grp grr grt gtb gtd gte gtg gto gtp gtr gtt ob- obb obd obe obg obo obp obr obt odb odd ode odg odo odp odr odt oeb oed oee oeg oeo oep oer oet ogd oge ogg ogo ogp ogt oo- oob ood oog ooo oop oor oot op- opb opd ope opg opo opp opr opt or- orb ord ore org oro orp orr ort ot- otb otd ote otg oto otp otr ott p-p pbb pbd pbe pbg pbo pbp pbr pbt pdb pdd pde pdg pdo pdp pdr pdt peb ped pee peg peo pep per pet pgb pgd pge pgg pgo pgp pgr pgt pob pod poe pog poo pop por pot ppb ppd ppe ppg ppo ppp ppr ppt prb prd pre prg pro prp prr prt pt- ptb ptd pte ptg pto ptp ptr ptt rbb rbd rbe rbg rbo rbp rbr rbt rdb rdd rde rdg rdo rdp rdr rdt re- reb red ree reg reo rep rer ret rgb rgd rge rgg rgo rgp rgr rgt rob rod roe rog roo rop ror rot rpb rpd rpe rpg rpo rpp rpr rpt rrb rrd rrg rrp rrr rrt rtb rtd rte rtg rto rtp rtr rtt tbb tbd tbe tbg tbo tbp tbr tbt tdb tdd tde tdg tdo tdp tdr tdt te- teb ted tee teg teo tep ter tet tgb tge tgg tgo tgp tgr tgt to- tob tod toe tog too top tor tot tpb tpd tpe tpg tpo tpp tpr tpt trb trd tre trg tro trp trr trt ttb ttd tte ttg tto ttp ttr ttt