5 letter words:
situp7,
4 letter words:
pits6,
ptui6,
puts6,
spit6,
tips6,
tups6,
suit4,
tuis4,
utis4,
3 letter words:
pis5,
pit5,
piu5,
psi5,
pst5,
pus5,
put5,
sip5,
sup5,
tip5,
tup5,
ups5,
its3,
sit3,
sui3,
tis3,
tui3,
uts3,
2 letter words:
pi4,
up4,
is2,
it2,
si2,
st2,
ti2,
us2,
ut2,
