5 letter words:
abies7,
4 letter words:
fabs9,
fibs9,
feis7,
safe7,
seif7,
base6,
bias6,
bise6,
isba6,
sabe6,
3 letter words:
fab8,
fib8,
efs6,
fae6,
fas6,
fes6,
fie6,
ifs6,
sif6,
abs5,
bas5,
bes5,
bis5,
sab5,
sib5,
ais3,
eas3,
sae3,
sai3,
sea3,
sei3,
2 letter words:
ef5,
fa5,
fe5,
if5,
ab4,
ba4,
be4,
bi4,
ae2,
ai2,
as2,
ea2,
es2,
is2,
si2,