-ol bbb bbc bbg bbl bbo bbs bcb bcc bcg bcl bco bcs bcz bgb bgc bgg bgl bgo bgs bgz blb blc blg bll blo bls blz bob boc bog bol boo bos boz bsb bsc bsg bsl bso bss bzo bzs bzz c-- cbb cbc cbg cbl cbo cbs cbz ccb ccc ccg ccl cco ccs ccz cgb cgc cgg cgl cgo cgs cl- clb clc clg cll clo cls clz co- cob coc cog col coo cos coz csb csc csg csl cso css csz cz- czc czo gbc gbg gbl gbo gbs gbz gcb gcc gcg gcl gco gcs ggb ggc ggg ggo ggs ggz glb glc glg gll glo gls glz gob goc gog gol goo gos goz gsb gsc gsg gsl gso gss gzo lbb lbc lbg lbl lbo lbs lcb lcc lcg lcl lco lcs lgb lgc lgg lgl lgo lgs llb llc llg lll llo lls llz lob loc log lol loo los loz lsb lsc lsg lsl lso lss lsz lzo lzs ob- obb obc obg obl obo obs oc- ocb occ ocg ocl oco ocs ocz ogc ogg ogl ogo ogs olb olc olg oll olo ols oo- oob ooc oog ool ooo oos os- osb osc osg osl oso oss ozo ozs ozz sbb sbc sbg sbl sbo sbs scb scc scg scl sco scs sgb sgc sgg sgl sgo sgs slb slc slg sll slo sls sob soc sog sol soo sos soz ss- ssb ssc ssg ssl sso sss ssz szl z-g zbb zbc zbl zbs zcl zco zcs zgb zgg zgs zo- zob zoc zog zol zoo zos zsg zsl zsz zzs zzz