4 letter words:
fido8,
foid8,
foud8,
tofu7,
doit5,
dout5,
duit5,
3 letter words:
dif7,
dof7,
fid7,
fud7,
fit6,
fou6,
oft6,
ufo6,
dit4,
dot4,
dui4,
duo4,
oud4,
tid4,
tod4,
udo4,
out3,
tui3,
utu3,
2 letter words:
if5,
of5,
di3,
do3,
id3,
od3,
io2,
it2,
oi2,
ou2,
ti2,
to2,
ut2,