7 letter words:
filfots13,
6 letter words:
filfot12,
soffit12,
5 letter words:
stiff11,
tiffs11,
toffs11,
filos8,
flits8,
foils8,
foist8,
lifts8,
lofts8,
toils5,
4 letter words:
offs10,
tiff10,
toff10,
filo7,
fils7,
fist7,
fits7,
flit7,
foil7,
lift7,
loft7,
sift7,
soft7,
list4,
lits4,
lost4,
loti4,
lots4,
oils4,
silo4,
silt4,
slit4,
slot4,
soil4,
soli4,
tils4,
toil4,
3 letter words:
iff9,
off9,
fil6,
fit6,
ifs6,
oft6,
sif6,
ios3,
iso3,
its3,
lis3,
lit3,
los3,
lot3,
oil3,
sit3,
sol3,
sot3,
til3,
tis3,
2 letter words:
if5,
of5,
io2,
is2,
it2,
li2,
lo2,
oi2,
os2,
si2,
so2,
st2,
ti2,
to2,