6 letter words:
option8,
potion8,
5 letter words:
input7,
pinot7,
pinto7,
piton7,
point7,
punto7,
puton7,
topoi7,
4 letter words:
pint6,
pion6,
poon6,
pout6,
ptui6,
punt6,
topi6,
topo6,
upon6,
into4,
onto4,
toon4,
unit4,
unto4,
3 letter words:
nip5,
opt5,
pin5,
pit5,
piu5,
poi5,
poo5,
pot5,
pun5,
put5,
tip5,
top5,
tup5,
upo5,
ion3,
nit3,
noo3,
not3,
nut3,
ono3,
oot3,
out3,
tin3,
ton3,
too3,
tui3,
tun3,
2 letter words:
op4,
pi4,
up4,
in2,
it2,
no2,
nu2,
oi2,
on2,
ti2,
to2,
un2,
ut2,