7 letter words:
triffer13,
5 letter words:
fifer11,
triff11,
firer8,
freit8,
frier8,
refit8,
rifer8,
rifte8,
treif8,
trier5,
4 letter words:
fief10,
fife10,
riff10,
teff10,
tiff10,
fier7,
fire7,
fret7,
frit7,
reft7,
reif7,
rife7,
rift7,
terf7,
tref7,
rite4,
tier4,
tire4,
tirr4,
trie4,
3 letter words:
eff9,
iff9,
eft6,
erf6,
fer6,
fet6,
fie6,
fir6,
fit6,
ref6,
rif6,
tef6,
err3,
ire3,
rei3,
ret3,
rit3,
tie3,
2 letter words:
ef5,
fe5,
if5,
er2,
et2,
it2,
re2,
te2,
ti2,
