5 letter words:
prexy17,
pyrex17,
4 letter words:
prex13,
prey9,
pyre9,
rype9,
puer6,
pure6,
3 letter words:
pyx15,
yex13,
rex10,
pry8,
puy8,
pye8,
yep8,
yup8,
rye6,
uey6,
per5,
pre5,
pur5,
rep5,
urp5,
rue3,
ure3,
2 letter words:
ex9,
xu9,
ye5,
yu5,
pe4,
up4,
er2,
re2,
ur2,