7 letter words:
unhappy17,
5 letter words:
happy15,
appuy12,
nappy12,
unpay10,
4 letter words:
yapp11,
hapu9,
puha9,
puny9,
yaup9,
pupa8,
yuan7,
puna6,
3 letter words:
hyp11,
hay9,
yah9,
hap8,
hup8,
pah8,
pay8,
puh8,
puy8,
pya8,
yap8,
yup8,
app7,
pap7,
pup7,
any6,
ayu6,
han6,
hun6,
nah6,
nay6,
nap5,
pan5,
pun5,
2 letter words:
ah5,
ay5,
ha5,
ny5,
uh5,
ya5,
yu5,
pa4,
up4,
an2,
na2,
nu2,
un2,