-ol bbb bbe bbh bbl bbo bbx be- beb bee beh bel beo bex bhb bhe bhh bhl bho bhx blb ble blh bll blo blx bob boe boh bol boo box bxb bxl bxo bxx ebb ebe ebh ebl ebo ebx eeb eee eel eeo eex ehb ehe ehh ehl eho elb ele elh ell elo elx eo- eob eoe eoh eol eoo ex- exe exh exl exo exx hbb hbe hbh hbl hbo hbx he- heb hee heh hel heo hex hhb hhe hhh hhl hho hlb hle hlh hll hlo hlx hob hoe hoh hol hoo hox hxl lbb lbe lbh lbl lbo lbx leb lee leh lel leo lex lhb lhh lho lhx llb lle lll llo lob loe loh lol loo lox lxo lxx ob- obb obe obh obl obo obx oeb oee oeh oel oeo oex ohe ohh ohl oho olb ole oll olo oo- oob ooh ool ooo oox ox- oxb oxo oxx xbe xbl xbx xee xel xex xlb xoo xox xxl xxo xxx