-ol bbb bbe bbl bbo be- beb bee bel beo bev blb ble bll blo blv bob boe bol boo bov bvb bve bvl bvo bvv ebb ebe ebl ebo ebv eeb eee eel eeo eev elb ele ell elo elv eo- eob eoe eol eoo evb eve evl evo evv lbb lbe lbl lbo lbv leb lee lel leo lev llb lle lll llo llv lob loe lol loo lov lvb lve lvl lvv ob- obb obe obl obo obv oeb oee oel oeo olb ole oll olo oo- oob ool ooo oov ov- ovb ove ovl ovo ovv v-e vbl vbo vbv veb vee vel veo vl- vlb vle vll vlo vlv vob voe vol voo vov vvb vvo vvv