b-u bbb bbc bbe bbl bbn bbu bcb bcc bce bcl bcn bcu be- beb bec bee bel ben beu blb blc ble bll bln blu bnb bnc bne bnl bnn bnu bub buc bue bul bun buu c-- cbb cbc cbe cbl cbn cbu ccb ccc cce ccl ccn ccu ce- ceb cec cee cel cen ceu cl- clb clc cle cll cln clu cn- cnb cnc cne cnl cnn cnu cub cuc cue cul cun cuu ebb ebc ebe ebl ebn ebu ec- ecb ecc ece ecl ecn ecu eeb eec eee eel een elb elc ele ell eln elu en- enb enc ene enl enn enu eu- eub euc eue eul eun lbb lbc lbe lbl lbu lcb lcc lce lcl lcn lcu leb lec lee lel len leu llb llc lle lll lln llu lnb lnc lne lnl lnn lnu lub luc lue lul lun luu nbb nbc nbe nbl nbn nbu ncb ncc nce ncl ncn ncu ne- neb nec nee nel nen neu nlb nlc nle nll nln nlu nnb nnc nne nnl nnn nnu nub nuc nue nul nun nuu ubb ubc ube ubl ubn ubu ucb ucc uce ucl ucn ucu ueb uec uee uel uen ulb ulc ule ull uln ulu un- unb unc une unl unn unu uuc uue uun uuu