4 letter words:
trez13,
ryfe10,
fret7,
reft7,
terf7,
tref7,
trey7,
trye7,
tyer7,
tyre7,
3 letter words:
fez15,
rez12,
fey9,
fry9,
eft6,
erf6,
fer6,
fet6,
ref6,
rye6,
tef6,
try6,
tye6,
yet6,
ret3,
2 letter words:
fy8,
ef5,
fe5,
ye5,
er2,
et2,
re2,
te2,