7 letter words:
infeoff16,
5 letter words:
feoff14,
4 letter words:
fief10,
fife10,
fine7,
fino7,
foin7,
info7,
neif7,
3 letter words:
eff9,
iff9,
off9,
fen6,
fie6,
fin6,
foe6,
fon6,
eon3,
ion3,
one3,
2 letter words:
ef5,
fe5,
if5,
of5,
en2,
in2,
ne2,
no2,
oe2,
oi2,
on2,
