-er -ol bbb bbd bbe bbg bbl bbo bbr bbs bdb bdd bde bdg bdl bdo bdr bds be- beb bed bee beg bel beo ber bes bgb bgd bge bgg bgl bgo bgr bgs blb bld ble blg bll blo blr bls bob bod boe bog bol boo bor bos brb brd bre brg brl bro brr brs bsb bsd bse bsg bsl bso bsr bss dbb dbd dbe dbg dbl dbo dbr dbs ddb ddd dde ddg ddl ddo ddr dds de- deb ded dee deg del deo der des dgd dge dgg dgl dgr dgs dl- dlb dld dle dlg dll dlo dlr dls dob dod doe dog dol doo dor dos drb drd dre drg drl dro drr drs dsb dsd dse dsg dsl dso dsr dss ebb ebd ebe ebg ebl ebo ebr ebs ed- edb edd ede edg edl edo edr eds eeb eed eee eeg eel eeo eer ees egb egd ege egg egl ego egr egs elb eld ele elg ell elo elr els eo- eob eod eoe eog eol eoo eor eos erb erd ere erg erl ero err ers es- esb esd ese esg esl eso esr ess g-d gbd gbe gbg gbl gbo gbr gbs gdb gdd gde gdl gdo gdr gds ge- geb ged gee geg gel geo ger ges ggb ggd ggg ggo ggr ggs glb gld gle glg gll glo glr gls gob god goe gog gol goo gor gos grb grd gre grg grl gro grr grs gsb gsd gse gsg gsl gso gsr gss lbb lbd lbe lbg lbl lbo lbr lbs ldb ldd lde ldg ldl ldo ldr lds leb led lee leg lel leo ler les lgb lgd lge lgg lgl lgo lgr lgs llb lld lle llg lll llo llr lls lob lod loe log lol loo lor los lrb lrd lrg lro lrr lrs lsb lsd lse lsg lsl lso lsr lss ob- obb obd obe obg obl obo obr obs odb odd ode odg odl odo odr ods oeb oed oee oeg oel oeo oer oes ogd oge ogg ogl ogo ogs olb old ole olg oll olo ols oo- oob ood oog ool ooo oor oos or- orb ord ore org orl oro orr ors os- osb osd ose osg osl oso osr oss rbb rbd rbe rbg rbl rbo rbr rbs rdb rdd rde rdg rdl rdo rdr rds re- reb red ree reg rel reo rer res rgb rgd rge rgg rgo rgr rgs rld rle rlg rll rlo rlr rls rob rod roe rog rol roo ror ros rrb rrd rrg rrl rrr rrs rsb rsd rse rsg rsl rso rsr rss sbb sbd sbe sbg sbl sbo sbr sbs sdb sdd sde sdg sdl sdo sdr sds se- seb sed see seg sel seo ser ses sgb sgd sge sgg sgl sgo sgr sgs slb sld sle slg sll slo slr sls sob sod soe sog sol soo sor sos sr- srb srd sre srg srl sro srr srs ss- ssb ssd sse ssg ssl sso ssr sss