I also used the same prompts and got this:
"
As an AI language model, I don't have personal experiences or emotions. However, if Billy has never seen the box before and is only aware of the label "flubbergums," he might assume that the contents of the box are "flubbergums." If the person showing Billy the contents of the box claims that the contents are "jellyfils," Billy might be surprised or confused, especially if he has never heard of "jellyfils" before. Without further information or context, it is difficult to determine what Billy might think is inside the box.
"