-ol bbb bbe bbi bbl bbo bbt be- beb bee bei bel beo bet bi- bib bie bii bil bio bit blb ble bli bll blo blt bob boe boi bol boo bot btb bte bti btl bto btt ebb ebe ebi ebl ebo ebt eeb eee eel eeo eet eib eie eii eil eio eit elb ele eli ell elo elt eo- eob eoe eoi eol eoo eot etb ete eti etl eto ett ibb ibe ibi ibl ibo ibt ie- iee iei iel iet iib iie iii iil iio iit il- ilb ile ili ill ilo ilt io- iob ioe ioi iol ioo iot itb ite iti itl ito itt lbb lbe lbi lbl lbo lbt leb lee lei lel leo let lib lie lii lil lio lit llb lle lli lll llo llt lob loe loi lol loo lot ltb lte lti ltl lto ltt o-i ob- obb obe obi obl obo obt oeb oee oei oel oeo oet oib oie oii oil oio oit olb ole oli oll olo olt oo- oob ooi ool ooo oot ot- otb ote oti otl oto ott tbb tbe tbi tbl tbo tbt te- teb tee tei tel teo tet tib tie tii til tio tit tle tli tll tlo tlt to- tob toe toi tol too tot ttb tte tti ttl tto ttt