-ol bbb bbg bbl bbo bbs bgb bgg bgl bgo bgs blb blg bll blo bls bob bog bol boo bos bsb bsg bsl bso bss gbg gbl gbo gbs ggb ggg ggo ggs glb glg gll glo gls gob gog gol goo gos gsb gsg gsl gso gss lbb lbg lbl lbo lbs lgb lgg lgl lgo lgs llb llg lll llo lls lob log lol loo los lsb lsg lsl lso lss ob- obb obg obl obo obs ogg ogl ogo ogs olb olg oll olo ols oo- oob oog ool ooo oos os- osb osg osl oso oss sbb sbg sbl sbo sbs sgb sgg sgl sgo sgs slb slg sll slo sls sob sog sol soo sos ss- ssb ssg ssl sso sss