-ol b-u bbb bbc bbd bbl bbn bbo bbt bbu bcb bcc bcd bcl bcn bco bct bcu bdb bdc bdd bdl bdo bdt bdu blb blc bld bll bln blo blt blu bnb bnc bnd bnl bnn bno bnt bnu bob boc bod bol bon boo bot bou btb btc btd btl btn bto btt btu bub buc bud bul bun buo but buu c-- cbb cbc cbd cbl cbn cbo cbt cbu ccb ccc ccd ccl ccn cco cct ccu cdb cdc cdd cdl cdn cdo cdt cdu cl- clb clc cld cll cln clo clt clu cn- cnb cnc cnd cnl cnn cno cnt cnu co- cob coc cod col con coo cot cou ctb ctc ctd ctl ctn cto ctt ctu cub cuc cud cul cun cuo cut cuu dbb dbc dbd dbl dbn dbo dbt dbu dcb dcc dcd dcl dcn dco dct dcu ddb ddc ddd ddl ddn ddo ddt ddu dl- dlb dlc dld dll dlo dlt dlu dnb dnc dnd dnl dnn dno dnt dob doc dod dol don doo dot dou dtb dtc dtd dtl dtn dto dtt dtu dub duc dud dul dun duo dut lbb lbc lbd lbl lbo lbt lbu lcb lcc lcd lcl lcn lco lct lcu ldb ldc ldd ldl ldn ldo ldt ldu llb llc lld lll lln llo llt llu lnb lnc lnd lnl lnn lno lnt lnu lob loc lod lol lon loo lot lou ltb ltc ltd ltl lto ltt ltu lub luc lud lul lun luo lut luu nbb nbc nbd nbl nbn nbo nbt nbu ncb ncc ncd ncl ncn nco nct ncu ndb ndc ndd ndl ndn ndo ndt ndu nlb nlc nld nll nln nlo nlt nlu nnb nnc nnl nnn nno nnt nnu no- nob noc nod nol non noo not nou ntb ntc ntd ntn nto ntt ntu nub nuc nud nul nun nuo nut nuu ob- obb obc obd obl obn obo obt obu oc- ocb occ ocd ocl ocn oco oct ocu odb odc odd odl odn odo odt odu olb olc old oll oln olo olt olu on- onb onc ond onl onn ono ont onu oo- oob ooc ood ool oon ooo oot ot- otb otc otd otl otn oto ott otu ou- ouc oud oul oun ouo out tbb tbc tbd tbl tbn tbo tbt tbu tcb tcc tcd tcl tcn tco tct tcu tdb tdc tdd tdl tdn tdo tdt tdu tlc tld tll tln tlo tlt tlu tnb tnc tnd tnl tnn tno tnt to- tob toc tod tol ton too tot tou ttb ttc ttd ttl ttn tto ttt ttu tub tuc tud tul tun tuo tut tuu ubb ubc ubl ubn ubo ubt ubu ucb ucc ucd ucl ucn uco uct ucu udb udc udd udl udn udo udt udu ulb ulc uld ull uln ulo ult ulu un- unb unc und unl unn uno unt unu uob uoc uod uol uon uoo uot utb utc utd utl utn uto utt utu uuc uun uut uuu