4 letter words:
firk11,
fork11,
kufi11,
work11,
frow10,
koru8,
kuri8,
four7,
3 letter words:
kif10,
kow10,
wok10,
wof9,
irk7,
kir7,
koi7,
kor7,
oik7,
ouk7,
rok7,
fir6,
for6,
fou6,
fro6,
fur6,
orf6,
rif6,
row6,
ufo6,
our3,
2 letter words:
ki6,
ko6,
if5,
of5,
ow5,
wo5,
io2,
oi2,
or2,
ou2,
ur2,