5 letter words:
festy11,
4 letter words:
feys10,
efts7,
fest7,
fets7,
stey7,
stye7,
tefs7,
tyes7,
yest7,
3 letter words:
fey9,
efs6,
eft6,
fes6,
fet6,
sey6,
sty6,
sye6,
tef6,
tye6,
yes6,
yet6,
est3,
set3,
tes3,
2 letter words:
fy8,
ef5,
fe5,
ye5,
es2,
et2,
st2,
te2,