4 letter words:
buhr9,
herb9,
enuf7,
fern7,
hern7,
huer7,
bren6,
burn6,
rube6,
unbe6,
rune4,
3 letter words:
feh9,
fub8,
hub8,
erf6,
fen6,
fer6,
feu6,
fun6,
fur6,
hen6,
her6,
hue6,
hun6,
nef6,
ref6,
reh6,
ben5,
bru5,
bun5,
bur5,
neb5,
nub5,
reb5,
rub5,
urb5,
ern3,
nur3,
ren3,
rue3,
run3,
ure3,
urn3,
2 letter words:
ef5,
eh5,
fe5,
he5,
uh5,
be4,
en2,
er2,
ne2,
nu2,
re2,
un2,
ur2,