6 letter words:
returf9,
5 letter words:
truer5,
4 letter words:
fret7,
furr7,
reft7,
terf7,
tref7,
turf7,
ruer4,
true4,
3 letter words:
eft6,
erf6,
fer6,
fet6,
feu6,
fur6,
ref6,
tef6,
err3,
ret3,
rue3,
rut3,
ure3,
ute3,
2 letter words:
ef5,
fe5,
er2,
et2,
re2,
te2,
ur2,
ut2,
