-ol bbb bbg bbk bbl bbo bbs bgb bgg bgk bgl bgo bgs bkb bkg bkk bkl bko bks blb blg blk bll blo bls bob bog bok bol boo bos bsb bsg bsk bsl bso bss gbg gbk gbl gbo gbs ggb ggg ggo ggs gkb gko gks glb glg glk gll glo gls gob gog gok gol goo gos gsb gsg gsk gsl gso gss kbb kbk kbl kbo kbs kgb kgl kgo kgs kkb kkk kkl kks kl- klb klg klo kls kob kog kok kol koo kos ksb ksg ksk ksl kso kss lbb lbg lbk lbl lbo lbs lgb lgg lgk lgl lgo lgs lkb lkg lkl lks llb llg llk lll llo lls lob log lok lol loo los lsb lsg lsk lsl lso lss ob- obb obg obk obl obo obs ogg ogl ogo ogs okb okg okk okl oko oks olb olg olk oll olo ols oo- oob oog ook ool ooo oos os- osb osg osk osl oso oss sbb sbg sbk sbl sbo sbs sgb sgg sgk sgl sgo sgs sk- skb skg skk skl sko sks slb slg slk sll slo sls sob sog sok sol soo sos ss- ssb ssg ssk ssl sso sss