b-u bbb bbe bbl bbu be- beb bee bel beu bev blb ble bll blu blv bub bue bul buu bvb bve bvl bvu bvv ebb ebe ebl ebu ebv eeb eee eel eev elb ele ell elu elv eu- eub eue eul euv evb eve evl evv lbb lbe lbl lbu lbv leb lee lel leu lev llb lle lll llu llv lub lue lul luu luv lvb lve lvl lvv ubb ube ubl ubu ubv ueb uee uel ulb ule ull ulu ulv uue uuu uvb uve uvl uvu uvv v-e vbl vbv veb vee vel veu vl- vlb vle vll vlv vue vul vuv vvb vvv