5 letter words:
koffs15,
skoff15,
4 letter words:
koff14,
kafs11,
offs10,
auks8,
koas8,
oaks8,
okas8,
ouks8,
skua8,
soak8,
souk8,
aufs7,
fous7,
oafs7,
sofa7,
ufos7,
3 letter words:
kaf10,
aff9,
off9,
ask7,
auk7,
kas7,
koa7,
kos7,
oak7,
oka7,
ouk7,
ska7,
suk7,
auf6,
fas6,
fou6,
oaf6,
ufo6,
ous3,
sau3,
sou3,
2 letter words:
ka6,
ko6,
fa5,
of5,
as2,
os2,
ou2,
so2,
us2,