-ol b-u bbb bbc bbf bbg bbl bbo bbu bcb bcc bcf bcg bcl bco bcu bfb bfc bff bfg bfl bfo bfu bgb bgc bgf bgg bgl bgo bgu blb blc blf blg bll blo blu bob boc bof bog bol boo bou bub buc buf bug bul buo buu c-- cbb cbc cbf cbg cbl cbo cbu ccb ccc ccf ccg ccl cco ccu cfb cfc cff cfg cfl cfo cfu cgb cgc cgg cgl cgo cgu cl- clb clc clf clg cll clo clu co- cob coc cof cog col coo cou cub cuc cuf cug cul cuo cuu fbb fbc fbf fbg fbl fbo fbu fcb fcc fcf fcg fcl fco fcu ffc fff ffg ffl ffo ffu fgb fgc fgf fgg fgl flb flc flf flg fll flo flu fob foc fof fog fol foo fou fub fuf fug ful fuo fuu gbc gbf gbg gbl gbo gbu gcb gcc gcf gcg gcl gco gcu gfb gfc gff gfl gfo ggb ggc ggg ggo ggu glb glc glf glg gll glo glu gob goc gof gog gol goo gou gu- gub guc guf gug gul guo guu lbb lbc lbf lbg lbl lbo lbu lcb lcc lcf lcg lcl lco lcu lfb lfc lff lfg lfl lfo lfu lgb lgc lgf lgg lgl lgo lgu llb llc llf llg lll llo llu lob loc lof log lol loo lou lub luc luf lug lul luo luu ob- obb obc obf obg obl obo obu oc- ocb occ ocf ocg ocl oco ocu of- ofb ofc off ofg ofl ofo ofu ogc ogf ogg ogl ogo olb olc olf olg oll olo olu oo- oob ooc oof oog ool ooo ou- ouc ouf oul ouo ubb ubc ubf ubg ubl ubo ubu ucb ucc ucf ucg ucl uco ucu ufc uff ufg ufl ufo ufu ugb ugc ugf ugg ugl ugo ugu ulb ulc ulf ulg ull ulo ulu uob uoc uog uol uoo uuc uug uuu