4 letter words:
flue7,
fuel7,
furl7,
herl7,
huer7,
hule7,
hurl7,
lehr7,
lure4,
rule4,
3 letter words:
feh9,
elf6,
erf6,
fer6,
feu6,
flu6,
fur6,
her6,
hue6,
ref6,
reh6,
leu3,
lur3,
rue3,
ule3,
ure3,
2 letter words:
ef5,
eh5,
fe5,
he5,
uh5,
el2,
er2,
re2,
ur2,