6 letter words:
swifts12,
5 letter words:
swift11,
fists8,
sifts8,
swits8,
wists8,
4 letter words:
fist7,
fits7,
sift7,
wiss7,
wist7,
wits7,
sist4,
sits4,
3 letter words:
fit6,
ifs6,
sif6,
wis6,
wit6,
its3,
sis3,
sit3,
tis3,
2 letter words:
if5,
is2,
it2,
si2,
st2,
ti2,