-er -ol bbb bbe bbg bbl bbm bbo bbr bbs be- beb bee beg bel bem beo ber bes bgb bge bgg bgl bgm bgo bgr bgs blb ble blg bll blm blo blr bls bmb bme bmg bml bmm bmo bmr bms bob boe bog bol bom boo bor bos brb bre brg brl brm bro brr brs bsb bse bsg bsl bsm bso bsr bss ebb ebe ebg ebl ebm ebo ebr ebs eeb eee eeg eel eem eeo eer ees egb ege egg egl egm ego egr egs elb ele elg ell elm elo elr els em- emb eme emg eml emm emo emr ems eo- eob eoe eog eol eom eoo eor eos erb ere erg erl erm ero err ers es- esb ese esg esl esm eso esr ess gbe gbg gbl gbm gbo gbr gbs ge- geb gee geg gel gem geo ger ges ggb ggg ggm ggo ggr ggs glb gle glg gll glm glo glr gls gmb gme gmg gml gmm gmo gmr gms gob goe gog gol gom goo gor gos grb gre grg grl grm gro grr grs gsb gse gsg gsl gsm gso gsr gss lbb lbe lbg lbl lbm lbo lbr lbs leb lee leg lel lem leo ler les lgb lge lgg lgl lgm lgo lgr lgs llb lle llg lll llm llo llr lls lmb lme lmg lml lmm lmo lmr lms lob loe log lol lom loo lor los lrb lrg lrm lro lrr lrs lsb lse lsg lsl lsm lso lsr lss m-o m-r mbb mbe mbg mbl mbm mbo mbr mbs meb mee meg mel mem meo mer mes mgb mge mgl mgm mgo mgr mgs mlb mle mlg mll mlm mlo mlr mls mmb mme mmg mml mmm mmo mmr mms mob moe mog mol mom moo mor mos mrb mre mrg mrl mrm mro mrr mrs msb mse msg msl msm mso msr mss ob- obb obe obg obl obm obo obr obs oeb oee oeg oel oem oeo oer oes oge ogg ogl ogo ogs olb ole olg oll olm olo ols om- omb ome omg oml omm omo omr oms oo- oob oog ool oom ooo oor oos or- orb ore org orl orm oro orr ors os- osb ose osg osl osm oso osr oss rbb rbe rbg rbl rbm rbo rbr rbs re- reb ree reg rel rem reo rer res rgb rge rgg rgo rgr rgs rle rlg rll rlm rlo rlr rls rmb rme rmg rml rmm rmo rmr rms rob roe rog rol rom roo ror ros rrb rrg rrl rrm rrr rrs rsb rse rsg rsl rsm rso rsr rss sbb sbe sbg sbl sbm sbo sbr sbs se- seb see seg sel sem seo ser ses sgb sge sgg sgl sgm sgo sgr sgs slb sle slg sll slm slo slr sls smb sme smg sml smm smo smr sms sob soe sog sol som soo sor sos sr- srb sre srg srl srm sro srr srs ss- ssb sse ssg ssl ssm sso ssr sss