4 letter words:
apps8,
kats8,
paps8,
skat8,
taks8,
task8,
apts6,
past6,
pats6,
spat6,
stap6,
taps6,
3 letter words:
app7,
ask7,
kas7,
kat7,
pap7,
ska7,
tak7,
tsk7,
apt5,
asp5,
pas5,
pat5,
pst5,
sap5,
spa5,
tap5,
sat3,
tas3,
2 letter words:
ka6,
pa4,
as2,
at2,
st2,
ta2,