bbb bbe bbi bbl bbt be- beb bee bei bel bet bez bi- bib bie bii bil bit biz blb ble bli bll blt blz btb bte bti btl btt btz bze bzz ebb ebe ebi ebl ebt eeb eee eel eet eib eie eii eil eit elb ele eli ell elt elz etb ete eti etl ett etz eze ezz ibb ibe ibi ibl ibt ibz ie- iee iei iel iet iib iie iii iil iit il- ilb ile ili ill ilt ilz itb ite iti itl itt itz ize izi izz lbb lbe lbi lbl lbt leb lee lei lel let lez lib lie lii lil lit liz llb lle lli lll llt llz ltb lte lti ltl ltt ltz lzi tbb tbe tbi tbl tbt tbz te- teb tee tei tel tet tez tib tie tii til tit tiz tle tli tll tlt tlz ttb tte tti ttl ttt tze zbb zbl zbt zeb zee zel zet zez zib zie zil zit ziz zlt zte ztl zzt zzz