6 letter words:
duffer13,
ruffed13,
5 letter words:
ruffe11,
4 letter words:
duff11,
ruff10,
feud8,
dure5,
rude5,
rued5,
3 letter words:
eff9,
def7,
fed7,
fud7,
fer6,
feu6,
fur6,
ref6,
due4,
red4,
urd4,
rue3,
2 letter words:
ef5,
fe5,
de3,
ed3,
er2,
re2,
