4 letter words:
apos6,
apso6,
naps6,
pans6,
poas6,
pons6,
snap6,
soap6,
span6,
naos4,
3 letter words:
apo5,
asp5,
nap5,
ops5,
pan5,
pas5,
poa5,
pos5,
sap5,
sop5,
spa5,
nas3,
nos3,
ons3,
san3,
son3,
2 letter words:
op4,
pa4,
po4,
an2,
as2,
na2,
no2,
on2,
os2,
so2,