-ol bbb bbe bbg bbl bbo bbx be- beb bee beg bel beo bex bgb bge bgg bgl bgo bgx blb ble blg bll blo blx bob boe bog bol boo box bxb bxl bxo bxx ebb ebe ebg ebl ebo ebx eeb eee eeg eel eeo eex egb ege egg egl ego egx elb ele elg ell elo elx eo- eob eoe eog eol eoo ex- exe exl exo exx gbe gbg gbl gbo gbx ge- geb gee geg gel geo gex ggb ggg ggo glb gle glg gll glo glx gob goe gog gol goo gox gxl lbb lbe lbg lbl lbo lbx leb lee leg lel leo lex lgb lge lgg lgl lgo llb lle llg lll llo lob loe log lol loo lox lxo lxx ob- obb obe obg obl obo obx oeb oee oeg oel oeo oex oge ogg ogl ogo ogx olb ole olg oll olo oo- oob oog ool ooo oox ox- oxb oxo oxx xbe xbl xbx xee xeg xel xex xge xgl xlb xlg xog xoo xox xxl xxo xxx