b-u bbb bbe bbl bbn bbu be- beb bee bel ben beu blb ble bll bln blu bnb bne bnl bnn bnu bub bue bul bun buu ebb ebe ebl ebn ebu eeb eee eel een elb ele ell eln elu en- enb ene enl enn enu eu- eub eue eul eun lbb lbe lbl lbu leb lee lel len leu llb lle lll lln llu lnb lne lnl lnn lnu lub lue lul lun luu nbb nbe nbl nbn nbu ne- neb nee nel nen neu nlb nle nll nln nlu nnb nne nnl nnn nnu nub nue nul nun nuu ubb ube ubl ubn ubu ueb uee uel uen ulb ule ull uln ulu un- unb une unl unn unu uue uun uuu