-ol b-u bbb bbc bbg bbk bbl bbo bbu bcb bcc bcg bck bcl bco bcu bgb bgc bgg bgk bgl bgo bgu bkb bkc bkg bkk bkl bko blb blc blg blk bll blo blu bob boc bog bok bol boo bou bub buc bug buk bul buo buu c-- cbb cbc cbg cbk cbl cbo cbu ccb ccc ccg cck ccl cco ccu cgb cgc cgg cgl cgo cgu ckb ckc cko cl- clb clc clg clk cll clo clu co- cob coc cog cok col coo cou cub cuc cug cuk cul cuo cuu gbc gbg gbk gbl gbo gbu gcb gcc gcg gck gcl gco gcu ggb ggc ggg ggo ggu gkb gko glb glc glg glk gll glo glu gob goc gog gok gol goo gou gu- gub guc gug guk gul guo guu kbb kbc kbk kbl kbo kbu kcb kcc kcg kck kcl kcu kgb kgc kgl kgo kgu kkb kkc kkk kkl kku kl- klb klc klg klo klu kob koc kog kok kol koo kou kub kuc kug kuk kul kuu lbb lbc lbg lbk lbl lbo lbu lcb lcc lcg lck lcl lco lcu lgb lgc lgg lgk lgl lgo lgu lkb lkg lkl llb llc llg llk lll llo llu lob loc log lok lol loo lou lub luc lug luk lul luo luu ob- obb obc obg obk obl obo obu oc- ocb occ ocg ock ocl oco ocu ogc ogg ogl ogo okb okc okg okk okl oko oku olb olc olg olk oll olo olu oo- oob ooc oog ook ool ooo ou- ouc ouk oul ouo ubb ubc ubg ubk ubl ubo ubu ucb ucc ucg uck ucl uco ucu ugb ugc ugg ugk ugl ugo ugu ukb ukc ukk ukl uku ulb ulc ulg ulk ull ulo ulu uob uoc uog uok uol uoo uuc uug uuu