5 letter words:
fisty11,
fusty11,
yufts11,
4 letter words:
yuft10,
fist7,
fits7,
fust7,
sift7,
suit4,
tuis4,
utis4,
3 letter words:
fit6,
ifs6,
sif6,
sty6,
yus6,
its3,
sit3,
sui3,
tis3,
tui3,
uts3,
2 letter words:
fy8,
if5,
yu5,
is2,
it2,
si2,
st2,
ti2,
us2,
ut2,