4 letter words:
iwis7,
rows7,
iris4,
ours4,
siri4,
sori4,
sour4,
3 letter words:
iwi6,
row6,
sow6,
wis6,
wos6,
wus6,
ios3,
iso3,
ors3,
our3,
ous3,
sir3,
sou3,
sri3,
sui3,
sur3,
2 letter words:
ow5,
wo5,
io2,
is2,
oi2,
or2,
os2,
ou2,
si2,
so2,
ur2,
us2,