5 letter words:
skiff15,
kiwis12,
4 letter words:
kifs11,
kiwi11,
woks11,
offs10,
kois8,
iwis7,
3 letter words:
kif10,
wok10,
iff9,
off9,
kis7,
koi7,
kos7,
ski7,
ifs6,
sow6,
wis6,
wos6,
2 letter words:
ki6,
if5,
of5,
ow5,
wo5,
is2,
oi2,
os2,
si2,
so2,