4 letter words:
bask10,
bosk10,
kabs10,
kobs10,
kaas8,
koas8,
oaks8,
okas8,
soak8,
abas6,
abos6,
baas6,
boas6,
obas6,
soba6,
3 letter words:
kab9,
kob9,
ask7,
kas7,
koa7,
kos7,
oak7,
oka7,
ska7,
aba5,
abo5,
abs5,
baa5,
bas5,
boa5,
bos5,
oba5,
sab5,
sob5,
aas3,
2 letter words:
ka6,
ab4,
ba4,
bo4,
aa2,
as2,
os2,
so2,