Task: Story Composition
Input (English): Premise: Mom bought a box of Little Debbie cookie snacks. 
 Initial Context: The box had a little window you could poke your finger through. 
 Original Ending: I sneaked several cookies through that window and gobbled them up. Mom later asked me how I thought the box was three cookies short. I told her it must have been a counting error at the factory! 
 New ending: I used to sneak several cookies through that window and gobbled them up. My mom would ask me how I thought the box was three cookies short. I would tell her it must have been a counting error at the factory! 
Output (English): Mom ate all the cookies before I could have one.