-ol bbb bbe bbg bbl bbo be- beb bee beg bel beo bev bgb bge bgg bgl bgo bgv blb ble blg bll blo blv bob boe bog bol boo bov bvb bve bvg bvl bvo bvv ebb ebe ebg ebl ebo ebv eeb eee eeg eel eeo eev egb ege egg egl ego elb ele elg ell elo elv eo- eob eoe eog eol eoo evb eve evg evl evo evv gbe gbg gbl gbo gbv ge- geb gee geg gel geo gev ggb ggg ggo ggv glb gle glg gll glo glv gob goe gog gol goo gov gvb gve gvg gvl gvo lbb lbe lbg lbl lbo lbv leb lee leg lel leo lev lgb lge lgg lgl lgo lgv llb lle llg lll llo llv lob loe log lol loo lov lvb lve lvg lvl lvv ob- obb obe obg obl obo obv oeb oee oeg oel oeo oge ogg ogl ogo olb ole olg oll olo oo- oob oog ool ooo oov ov- ovb ove ovl ovo ovv v-e vbg vbl vbo vbv veb vee veg vel veo vgg vgl vgo vl- vlb vle vll vlo vlv vob voe vog vol voo vov vvb vvg vvo vvv