puppy upppy ppupy ppupy upppy puppy puppy upppy ppupy ppupy upppy puppy pppuy pppuy pppuy pppuy pppuy pppuy upppy puppy upppy puppy ppupy ppupy pupyp uppyp ppuyp ppuyp uppyp pupyp puypp upypp pyupp ypupp uyppp yuppp ppyup ppyup pypup yppup pypup yppup upypp puypp uyppp yuppp pyupp ypupp pupyp uppyp ppuyp ppuyp uppyp pupyp puypp upypp pyupp ypupp uyppp yuppp ppyup ppyup pypup yppup pypup yppup upypp puypp uyppp yuppp pyupp ypupp pppyu pppyu pppyu pppyu pppyu pppyu ppypu ppypu pyppu ypppu pyppu ypppu ppypu ppypu pyppu ypppu pyppu ypppu ppypu ppypu pyppu ypppu pyppu ypppu uppyp pupyp uppyp pupyp ppuyp ppuyp upypp puypp uyppp yuppp pyupp ypupp upypp puypp uyppp yuppp pyupp ypupp ppyup ppyup pypup yppup pypup yppup
Note: these 'words' (valid or invalid) are all the permutations of the word puppy. These words are obtained by scrambling the letters in puppy.