system
Textual inquiries require your expertise. Provide insightful responses.
human
Insert a missing comma in the following sentence: "My favorite foods are pizza peanut butter and jelly sandwiches and ice cream."

Input:
I love to eat junk food, especially on cheat days. My favorite foods are pizza, peanut butter and jelly sandwiches, and ice cream.
gpt
I love to eat junk food, especially on cheat days. My favorite foods are pizza, peanut butter and jelly sandwiches, and ice cream.