-ol b-u bbb bbc bbl bbn bbo bbt bbu bcb bcc bcl bcn bco bct bcu blb blc bll bln blo blt blu bnb bnc bnl bnn bno bnt bnu bob boc bol bon boo bot bou btb btc btl btn bto btt btu bub buc bul bun buo but buu c-- cbb cbc cbl cbn cbo cbt cbu ccb ccc ccl ccn cco cct ccu cl- clb clc cll cln clo clt clu cn- cnb cnc cnl cnn cno cnt cnu co- cob coc col con coo cot cou ctb ctc ctl ctn cto ctt ctu cub cuc cul cun cuo cut cuu lbb lbc lbl lbo lbt lbu lcb lcc lcl lcn lco lct lcu llb llc lll lln llo llt llu lnb lnc lnl lnn lno lnt lnu lob loc lol lon loo lot lou ltb ltc ltl lto ltt ltu lub luc lul lun luo lut luu nbb nbc nbl nbn nbo nbt nbu ncb ncc ncl ncn nco nct ncu nlb nlc nll nln nlo nlt nlu nnb nnc nnl nnn nno nnt nnu no- nob noc nol non noo not nou ntb ntc ntn nto ntt ntu nub nuc nul nun nuo nut nuu ob- obb obc obl obn obo obt obu oc- ocb occ ocl ocn oco oct ocu olb olc oll oln olo olt olu on- onb onc onl onn ono ont onu oo- oob ooc ool oon ooo oot ot- otb otc otl otn oto ott otu ou- ouc oul oun ouo out tbb tbc tbl tbn tbo tbt tbu tcb tcc tcl tcn tco tct tcu tlc tll tln tlo tlt tlu tnb tnc tnl tnn tno tnt to- tob toc tol ton too tot tou ttb ttc ttl ttn tto ttt ttu tub tuc tul tun tuo tut tuu ubb ubc ubl ubn ubo ubt ubu ucb ucc ucl ucn uco uct ucu ulb ulc ull uln ulo ult ulu un- unb unc unl unn uno unt unu uob uoc uol uon uoo uot utb utc utl utn uto utt utu uuc uun uut uuu