-ol bbb bbe bbi bbl bbo be- beb bee bei bel beo bi- bib bie bii bil bio blb ble bli bll blo bob boe boi bol boo ebb ebe ebi ebl ebo eeb eee eel eeo eib eie eii eil eio elb ele eli ell elo eo- eob eoe eoi eol eoo ibb ibe ibi ibl ibo ie- iee iei iel iib iie iii iil iio il- ilb ile ili ill ilo io- iob ioe ioi iol ioo lbb lbe lbi lbl lbo leb lee lei lel leo lib lie lii lil lio llb lle lli lll llo lob loe loi lol loo o-i ob- obb obe obi obl obo oeb oee oei oel oeo oib oie oii oil oio olb ole oli oll olo oo- oob ooi ool ooo