-er -ol bbb bbd bbe bbg bbk bbl bbo bbr bbs bdb bdd bde bdg bdk bdl bdo bdr bds be- beb bed bee beg bek bel beo ber bes bgb bgd bge bgg bgk bgl bgo bgr bgs bkb bke bkg bkk bkl bko bkr bks blb bld ble blg blk bll blo blr bls bob bod boe bog bok bol boo bor bos brb brd bre brg brk brl bro brr brs bsb bsd bse bsg bsk bsl bso bsr bss dbb dbd dbe dbg dbk dbl dbo dbr dbs ddb ddd dde ddg ddk ddl ddo ddr dds de- deb ded dee deg dek del deo der des dgd dge dgg dgk dgl dgr dgs dkb dke dkg dkk dkl dko dkr dks dl- dlb dld dle dlg dlk dll dlo dlr dls dob dod doe dog dok dol doo dor dos drb drd dre drg drk drl dro drr drs dsb dsd dse dsg dsk dsl dso dsr dss ebb ebd ebe ebg ebk ebl ebo ebr ebs ed- edb edd ede edg edk edl edo edr eds eeb eed eee eeg eek eel eeo eer ees egb egd ege egg egl ego egr egs ekb ekd eke ekg ekl eko ekr eks elb eld ele elg elk ell elo elr els eo- eob eod eoe eog eok eol eoo eor eos erb erd ere erg erk erl ero err ers es- esb esd ese esg esk esl eso esr ess g-d gbd gbe gbg gbk gbl gbo gbr gbs gdb gdd gde gdk gdl gdo gdr gds ge- geb ged gee geg gek gel geo ger ges ggb ggd ggg ggo ggr ggs gkb gkd gko gks glb gld gle glg glk gll glo glr gls gob god goe gog gok gol goo gor gos grb grd gre grg grk grl gro grr grs gsb gsd gse gsg gsk gsl gso gsr gss kbb kbd kbe kbk kbl kbo kbr kbs kdb kde kdg kdk kdl kdo kdr kds ke- keb ked kee keg kek kel keo ker kes kgb kgd kgl kgo kgs kkb kke kkk kkl kkr kks kl- klb kld klg klo klr kls kob kod koe kog kok kol koo kor kos krd krg krk krl kro krr krs ksb ksd kse ksg ksk ksl kso ksr kss lbb lbd lbe lbg lbk lbl lbo lbr lbs ldb ldd lde ldg ldk ldl ldo ldr lds leb led lee leg lek lel leo ler les lgb lgd lge lgg lgk lgl lgo lgr lgs lkb lkg lkl lkr lks llb lld lle llg llk lll llo llr lls lob lod loe log lok lol loo lor los lrb lrd lrg lrk lro lrr lrs lsb lsd lse lsg lsk lsl lso lsr lss ob- obb obd obe obg obk 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 okb okd oke okg okk okl oko okr oks olb old ole olg olk oll olo ols oo- oob ood oog ook ool ooo oor oos or- orb ord ore org ork orl oro orr ors os- osb osd ose osg osk osl oso osr oss rbb rbd rbe rbg rbk rbl rbo rbr rbs rdb rdd rde rdg rdl rdo rdr rds re- reb red ree reg rek rel reo rer res rgb rgd rge rgg rgk rgo rgr rgs rkb rke rkg rkk rko rks rld rle rlg rll rlo rlr rls rob rod roe rog rok rol roo ror ros rrb rrd rrg rrk rrl rrr rrs rsb rsd rse rsg rsk rsl rso rsr rss sbb sbd sbe sbg sbk sbl sbo sbr sbs sdb sdd sde sdg sdk sdl sdo sdr sds se- seb sed see seg sek sel seo ser ses sgb sgd sge sgg sgk sgl sgo sgr sgs sk- skb skd ske skg skk skl sko skr sks slb sld sle slg slk sll slo slr sls sob sod soe sog sok sol soo sor sos sr- srb srd sre srg srk srl sro srr srs ss- ssb ssd sse ssg ssk ssl sso ssr sss