-ol bbb bbd bbi bbl bbo bbt bdb bdd bdi bdl bdo bdt bi- bib bid bii bil bio bit blb bld bli bll blo blt bob bod boi bol boo bot btb btd bti btl bto btt dbb dbd dbi dbl dbo dbt ddb ddd ddi ddl ddo ddt di- dib did dii dil dio dit dl- dlb dld dli dll dlo dlt dob dod doi dol doo dot dtb dtd dti dtl dto dtt i-d ibb ibd ibi ibl ibo ibt idb idd idi idl ido idt iib iid iii iil iio iit il- ilb ild ili ill ilo ilt io- iob iod ioi iol ioo iot itb itd iti itl ito itt lbb lbd lbi lbl lbo lbt ldb ldd ldi ldl ldo ldt lib lid lii lil lio lit llb lld lli lll llo llt lob lod loi lol loo lot ltb ltd lti ltl lto ltt o-i ob- obb obd obi obl obo obt odb odd odi odl odo odt oib oid oii oil oio oit olb old oli oll olo olt oo- oob ood ooi ool ooo oot ot- otb otd oti otl oto ott tbb tbd tbi tbl tbo tbt tdb tdd tdi tdl tdo tdt tib tid tii til tio tit tld tli tll tlo tlt to- tob tod toi tol too tot ttb ttd tti ttl tto ttt