-ol bbb bbg bbl bbo bbr bbs bgb bgg bgl bgo bgr bgs blb blg bll blo blr bls bob bog bol boo bor bos brb brg brl bro brr brs bsb bsg bsl bso bsr bss gbg gbl gbo gbr gbs ggb ggg ggo ggr ggs glb glg gll glo glr gls gob gog gol goo gor gos grb grg grl gro grr grs gsb gsg gsl gso gsr gss lbb lbg lbl lbo lbr lbs lgb lgg lgl lgo lgr lgs llb llg lll llo llr lls lob log lol loo lor los lrb lrg lro lrr lrs lsb lsg lsl lso lsr lss ob- obb obg obl obo obr obs ogg ogl ogo ogs olb olg oll olo ols oo- oob oog ool ooo oor oos or- orb org orl oro orr ors os- osb osg osl oso osr oss rbb rbg rbl rbo rbr rbs rgb rgg rgo rgr rgs rlg rll rlo rlr rls rob rog rol roo ror ros rrb rrg rrl rrr rrs rsb rsg rsl rso rsr rss sbb sbg sbl sbo sbr sbs sgb sgg sgl sgo sgr sgs slb slg sll slo slr sls sob sog sol soo sor sos sr- srb srg srl sro srr srs ss- ssb ssg ssl sso ssr sss