4 letter words:
bill6,
bito6,
blot6,
boil6,
boll6,
bolt6,
lobi6,
obit6,
lilo4,
lilt4,
loti4,
till4,
toil4,
toll4,
3 letter words:
bio5,
bit5,
boi5,
bot5,
lib5,
lob5,
obi5,
ill3,
lit3,
lot3,
oil3,
til3,
2 letter words:
bi4,
bo4,
ob4,
io2,
it2,
li2,
lo2,
oi2,
ti2,
to2,