4 letter words:
fain7,
fane7,
fine7,
naif7,
neif7,
nape6,
neap6,
nipa6,
pain6,
pane6,
pean6,
pein6,
pian6,
pina6,
pine6,
inia4,
3 letter words:
fan6,
fen6,
fie6,
fin6,
ape5,
nap5,
nip5,
pan5,
pea5,
pen5,
pia5,
pie5,
pin5,
ain3,
ane3,
ani3,
nae3,
2 letter words:
ef5,
fa5,
fe5,
if5,
pa4,
pe4,
pi4,
ae2,
ai2,
an2,
en2,
in2,
na2,
ne2,