-ly -ol bbb bbd bbl bbo bbt bby bdb bdd bdl bdo bdt bdy blb bld bll blo blt bly bob bod bol boo bot boy btb btd btl bto btt bty by- byd byl byo byt dbb dbd dbl dbo dbt dby ddb ddd ddl ddo ddt ddy dl- dlb dld dll dlo dlt dly dob dod dol doo dot doy dtb dtd dtl dto dtt dty dy- dyb dyd dyo dyy lbb lbd lbl lbo lbt ldb ldd ldl ldo ldt ldy llb lld lll llo llt lly lob lod lol loo lot loy ltb ltd ltl lto ltt lyd lyl lyo lyt ob- obb obd obl obo obt oby odb odd odl odo odt olb old oll olo olt oly oo- oob ood ool ooo oot ot- otb otd otl oto ott oyd oyl oyo tbb tbd tbl tbo tbt tdb tdd tdl tdo tdt tdy tld tll tlo tlt to- tob tod tol too tot toy ttb ttd ttl tto ttt tty tyd tyl tyo tyt ybl yby ydl ydo ydt ydy yld yll ylt yly yob yod yol yoo yot yoy ytd ytl yto ytt yyb yyt yyy