4 letter words:
faff13,
baff12,
biff12,
pfft12,
tiff10,
baft9,
fiat7,
bait6,
pita6,
tabi6,
3 letter words:
aff9,
iff9,
fab8,
fap8,
fib8,
bap7,
aft6,
fat6,
fit6,
apt5,
bat5,
bit5,
pat5,
pia5,
pit5,
tab5,
tap5,
tip5,
ait3,
ita3,
tai3,
2 letter words:
fa5,
if5,
ab4,
ba4,
bi4,
pa4,
pi4,
ai2,
at2,
it2,
ta2,
ti2,