bbb bbd bbi bbl bbt bdb bdd bdi bdl bdt bi- bib bid bii bil bit blb bld bli bll blt btb btd bti btl btt dbb dbd dbi dbl dbt ddb ddd ddi ddl ddt di- dib did dii dil dit dl- dlb dld dli dll dlt dtb dtd dti dtl dtt i-d ibb ibd ibi ibl ibt idb idd idi idl idt iib iid iii iil iit il- ilb ild ili ill ilt itb itd iti itl itt lbb lbd lbi lbl lbt ldb ldd ldi ldl ldt lib lid lii lil lit llb lld lli lll llt ltb ltd lti ltl ltt tbb tbd tbi tbl tbt tdb tdd tdi tdl tdt tib tid tii til tit tld tli tll tlt ttb ttd tti ttl ttt