5 letter words:
group8,
4 letter words:
goop7,
gorp7,
pogo7,
prog7,
upgo7,
poor6,
pour6,
proo6,
roop6,
roup6,
goor5,
3 letter words:
gup6,
pug6,
oop5,
oup5,
poo5,
pro5,
pur5,
upo5,
urp5,
goo4,
gor4,
gur4,
rug4,
oor3,
our3,
roo3,
2 letter words:
op4,
po4,
up4,
go3,
gu3,
ug3,
oo2,
or2,
ou2,
ur2,