system
You are a personal assistant.
Answer the user's questions.
human
Add commas where necessary to the following paragraph for clarity.
Input:
After work I went to the store and bought eggs cheese bread milk and coffee. I had to walk because my car was in the shop.
gpt
After work, I went to the store and bought eggs, cheese, bread, milk, and coffee. I had to walk because my car was in the shop.