b-u bbb bbc bbe bbl bbn bbt bbu bcb bcc bce bcl bcn bct bcu be- beb bec bee bel ben bet beu blb blc ble bll bln blt blu bnb bnc bne bnl bnn bnt bnu btb btc bte btl btn btt btu bub buc bue bul bun but buu c-- cbb cbc cbe cbl cbn cbt cbu ccb ccc cce ccl ccn cct ccu ce- ceb cec cee cel cen cet ceu cl- clb clc cle cll cln clt clu cn- cnb cnc cne cnl cnn cnt cnu ctb ctc cte ctl ctn ctt ctu cub cuc cue cul cun cut cuu ebb ebc ebe ebl ebn ebt ebu ec- ecb ecc ece ecl ecn ect ecu eeb eec eee eel een eet elb elc ele ell eln elt elu en- enb enc ene enl enn ent enu etb etc ete etl etn ett etu eu- eub euc eue eul eun eut lbb lbc lbe lbl lbt lbu lcb lcc lce lcl lcn lct lcu leb lec lee lel len let leu llb llc lle lll lln llt llu lnb lnc lne lnl lnn lnt lnu ltb ltc lte ltl ltt ltu lub luc lue lul lun lut luu nbb nbc nbe nbl nbn nbt nbu ncb ncc nce ncl ncn nct ncu ne- neb nec nee nel nen net neu nlb nlc nle nll nln nlt nlu nnb nnc nne nnl nnn nnt nnu ntb ntc nte ntn ntt ntu nub nuc nue nul nun nut nuu tbb tbc tbe tbl tbn tbt tbu tcb tcc tce tcl tcn tct tcu te- teb tec tee tel ten tet teu tlc tle tll tln tlt tlu tnb tnc tne tnl tnn tnt ttb ttc tte ttl ttn ttt ttu tub tuc tue tul tun tut tuu ubb ubc ube ubl ubn ubt ubu ucb ucc uce ucl ucn uct ucu ueb uec uee uel uen uet ulb ulc ule ull uln ult ulu un- unb unc une unl unn unt unu utb utc ute utl utn utt utu uuc uue uun uut uuu