-er -ol bbb bbe bbg bbl bbo bbr bbs be- beb bee beg bel beo ber bes bgb bge bgg bgl bgo bgr bgs blb ble blg bll blo blr bls bob boe bog bol boo bor bos brb bre brg brl bro brr brs bsb bse bsg bsl bso bsr bss ebb ebe ebg ebl ebo ebr ebs eeb eee eeg eel eeo eer ees egb ege egg egl ego egr egs elb ele elg ell elo elr els eo- eob eoe eog eol eoo eor eos erb ere erg erl ero err ers es- esb ese esg esl eso esr ess gbe gbg gbl gbo gbr gbs ge- geb gee geg gel geo ger ges ggb ggg ggo ggr ggs glb gle glg gll glo glr gls gob goe gog gol goo gor gos grb gre grg grl gro grr grs gsb gse gsg gsl gso gsr gss lbb lbe lbg lbl lbo lbr lbs leb lee leg lel leo ler les lgb lge lgg lgl lgo lgr lgs llb lle llg lll llo llr lls lob loe log lol loo lor los lrb lrg lro lrr lrs lsb lse lsg lsl lso lsr lss ob- obb obe obg obl obo obr obs oeb oee oeg oel oeo oer oes oge ogg ogl ogo ogs olb ole olg oll olo ols oo- oob oog ool ooo oor oos or- orb ore org orl oro orr ors os- osb ose osg osl oso osr oss rbb rbe rbg rbl rbo rbr rbs re- reb ree reg rel reo rer res rgb rge rgg rgo rgr rgs rle rlg rll rlo rlr rls rob roe rog rol roo ror ros rrb rrg rrl rrr rrs rsb rse rsg rsl rso rsr rss sbb sbe sbg sbl sbo sbr sbs se- seb see seg sel seo ser ses sgb sge sgg sgl sgo sgr sgs slb sle slg sll slo slr sls sob soe sog sol soo sor sos sr- srb sre srg srl sro srr srs ss- ssb sse ssg ssl sso ssr sss