4 letter words:
iwis7,
owts7,
stow7,
swot7,
tows7,
twos7,
wist7,
wits7,
wost7,
wots7,
isit4,
oust4,
outs4,
sout4,
suit4,
tuis4,
utis4,
3 letter words:
iwi6,
owt6,
sow6,
tow6,
two6,
wis6,
wit6,
wos6,
wot6,
wus6,
ios3,
iso3,
its3,
ous3,
out3,
sit3,
sot3,
sou3,
sui3,
tis3,
tui3,
uts3,
2 letter words:
ow5,
wo5,
io2,
is2,
it2,
oi2,
os2,
ou2,
si2,
so2,
st2,
ti2,
to2,
us2,
ut2,