5 letter words:
floor8,
folio8,
4 letter words:
riff10,
filo7,
flir7,
flor7,
foil7,
fool7,
loof7,
rolf7,
roof7,
loir4,
loor4,
olio4,
roil4,
3 letter words:
iff9,
off9,
fil6,
fir6,
for6,
fro6,
oof6,
orf6,
rif6,
loo3,
lor3,
oil3,
oor3,
roo3,
2 letter words:
if5,
of5,
io2,
li2,
lo2,
oi2,
oo2,
or2,