Pretty self explanatory.
Here is an example:
Me: I lock the cookie in a safe.
Person2: I steal the key and open the safe. I take the cookie and throw it in a hole.
Person3: The hole is 2 inches deep. I pick up the cookie and put it in my bag.
And so on.
You are not allowed to destroy; purchase, make a new cookie or somehow receive another unless it's impossible to get.
Starting off from the last example; I put the cookie in my bag.