-ol bbb bbg bbl bbn bbo bbr bgb bgg bgl bgn bgo bgr blb blg bll bln blo blr bnb bng bnl bnn bno bnr bob bog bol bon boo bor brb brg brl brn bro brr gbg gbl gbn gbo gbr ggb ggg ggn ggo ggr glb glg gll gln glo glr gnb gnl gnn gno gnr gob gog gol gon goo gor grb grg grl grn gro grr lbb lbg lbl lbo lbr lgb lgg lgl lgn lgo lgr llb llg lll lln llo llr lnb lng lnl lnn lno lnr lob log lol lon loo lor lrb lrg lrn lro lrr nbb nbg nbl nbn nbo nbr ngb ngg ngl ngn ngo nlb nlg nll nln nlo nlr nnb nng nnl nnn nno no- nob nog nol non noo nor nrb nrg nrl nrn nro nrr ob- obb obg obl obn obo obr ogg ogl ogn ogo olb olg oll oln olo on- onb ong onl onn ono onr oo- oob oog ool oon ooo oor or- orb org orl orn oro orr rbb rbg rbl rbn rbo rbr rgb rgg rgn rgo rgr rlg rll rln rlo rlr rnb rng rnn rno rnr rob rog rol ron roo ror rrb rrg rrl rrn rrr