6 letter words:
preife11,
priefe11,
5 letter words:
preif10,
prief10,
fiere8,
4 letter words:
prof9,
feer7,
fere7,
fier7,
fire7,
fore7,
free7,
froe7,
orfe7,
reef7,
reif7,
rife7,
peer6,
pere6,
peri6,
pier6,
pore6,
pree6,
repo6,
ripe6,
rope6,
3 letter words:
fop8,
erf6,
fee6,
fer6,
fie6,
fir6,
foe6,
for6,
fro6,
orf6,
ref6,
rif6,
ope5,
pee5,
per5,
pie5,
pir5,
poi5,
pre5,
pro5,
rep5,
rip5,
ere3,
ire3,
ore3,
ree3,
rei3,
reo3,
roe3,
2 letter words:
ef5,
fe5,
if5,
of5,
op4,
pe4,
pi4,
po4,
ee2,
er2,
io2,
oe2,
oi2,
or2,
re2,