5 letter words:
bourg8,
group8,
4 letter words:
burp8,
prob8,
brog7,
burg7,
gorp7,
grub7,
prog7,
upgo7,
pour6,
roup6,
3 letter words:
bop7,
pub7,
bog6,
bug6,
gob6,
gub6,
gup6,
pug6,
bor5,
bro5,
bru5,
bur5,
orb5,
oup5,
pro5,
pur5,
rob5,
rub5,
upo5,
urb5,
urp5,
gor4,
gur4,
rug4,
our3,
2 letter words:
bo4,
ob4,
op4,
po4,
up4,
go3,
gu3,
ug3,
or2,
ou2,
ur2,