4 letter words:
pook10,
pouk10,
dook9,
douk9,
kudo9,
oppo8,
poop8,
doup7,
pood7,
updo7,
3 letter words:
kop9,
ouk7,
pop7,
pup7,
dop6,
dup6,
pod6,
pud6,
oop5,
oup5,
poo5,
upo5,
doo4,
duo4,
oud4,
udo4,
2 letter words:
ko6,
op4,
po4,
up4,
do3,
od3,
oo2,
ou2,