4 letter words:
park10,
peak10,
perk10,
rake8,
reak8,
aper6,
pare6,
pear6,
rape6,
reap6,
3 letter words:
kep9,
ake7,
ark7,
erk7,
kae7,
kea7,
ape5,
par5,
pea5,
per5,
pre5,
rap5,
rep5,
are3,
ear3,
era3,
2 letter words:
ka6,
pa4,
pe4,
ae2,
ar2,
ea2,
er2,
re2,