4 letter words:
beef9,
feeb9,
beep8,
pube8,
feet7,
fete7,
beet6,
bete6,
bute6,
tube6,
3 letter words:
fub8,
pub7,
eft6,
fee6,
fet6,
feu6,
tef6,
bee5,
bet5,
but5,
pee5,
pet5,
put5,
tub5,
tup5,
tee3,
ute3,
2 letter words:
ef5,
fe5,
be4,
pe4,
up4,
ee2,
et2,
te2,
ut2,