bbb bbd bbe bbi bbl bbt bdb bdd bde bdi bdl bdt be- beb bed bee bei bel bet bi- bib bid bie bii bil bit blb bld ble bli bll blt btb btd bte bti btl btt dbb dbd dbe dbi dbl dbt ddb ddd dde ddi ddl ddt de- deb ded dee dei del det di- dib did die dii dil dit dl- dlb dld dle dli dll dlt dtb dtd dte dti dtl dtt ebb ebd ebe ebi ebl ebt ed- edb edd ede edi edl edt eeb eed eee eel eet eib eid eie eii eil eit elb eld ele eli ell elt etb etd ete eti etl ett i-d ibb ibd ibe ibi ibl ibt idb idd ide idi idl idt ie- ied iee iei iel iet iib iid iie iii iil iit il- ilb ild ile ili ill ilt itb itd ite iti itl itt lbb lbd lbe lbi lbl lbt ldb ldd lde ldi ldl ldt leb led lee lei lel let lib lid lie lii lil lit llb lld lle lli lll llt ltb ltd lte lti ltl ltt tbb tbd tbe tbi tbl tbt tdb tdd tde tdi tdl tdt te- teb ted tee tei tel tet tib tid tie tii til tit tld tle tli tll tlt ttb ttd tte tti ttl ttt