b-u bbb bbe bbl bbn bbu be- beb bee bel ben beu bev blb ble bll bln blu blv bnb bne bnl bnn bnu bnv bub bue bul bun buu bvb bve bvl bvn bvu bvv ebb ebe ebl ebn ebu ebv eeb eee eel een eev elb ele ell eln elu elv en- enb ene enl enn enu env eu- eub eue eul eun euv evb eve evl evn evv lbb lbe lbl lbu lbv leb lee lel len leu lev llb lle lll lln llu llv lnb lne lnl lnn lnu lub lue lul lun luu luv lvb lve lvl lvn lvv nbb nbe nbl nbn nbu nbv ne- neb nee nel nen neu nev nlb nle nll nln nlu nlv nnb nne nnl nnn nnu nnv nub nue nul nun nuu nuv nvb nve nvl nvn nvu nvv ubb ube ubl ubn ubu ubv ueb uee uel uen ulb ule ull uln ulu ulv un- unb une unl unn unu unv uue uun uuu uvb uve uvl uvu uvv v-e vbl vbv veb vee vel ven veu vl- vlb vle vll vlv vn- vnl vnu vnv vue vul vuv vvb vvv