-ol bbb bbc bbg bbl bbn bbo bcb bcc bcg bcl bcn bco bgb bgc bgg bgl bgn bgo blb blc blg bll bln blo bnb bnc bng bnl bnn bno bob boc bog bol bon boo c-- cbb cbc cbg cbl cbn cbo ccb ccc ccg ccl ccn cco cgb cgc cgg cgl cgn cgo cl- clb clc clg cll cln clo cn- cnb cnc cng cnl cnn cno co- cob coc cog col con coo gbc gbg gbl gbn gbo gcb gcc gcg gcl gcn gco ggb ggc ggg ggn ggo glb glc glg gll gln glo gnb gnc gnl gnn gno gob goc gog gol gon goo lbb lbc lbg lbl lbo lcb lcc lcg lcl lcn lco lgb lgc lgg lgl lgn lgo llb llc llg lll lln llo lnb lnc lng lnl lnn lno lob loc log lol lon loo nbb nbc nbg nbl nbn nbo ncb ncc ncg ncl ncn nco ngb ngc ngg ngl ngn ngo nlb nlc nlg nll nln nlo nnb nnc nng nnl nnn nno no- nob noc nog nol non noo ob- obb obc obg obl obn obo oc- ocb occ ocg ocl ocn oco ogc ogg ogl ogn ogo olb olc olg oll oln olo on- onb onc ong onl onn ono oo- oob ooc oog ool oon ooo