Task: Story Composition
Input (English): Premise: Mary gathered her coupons for a trip to the grocery store. 
 Initial Context: She walked the aisles, carefully choosing items matching the coupons. 
 Original Ending: Then, Mary wheeled her cart to the cashier. A line grew behind her as the cashier slowly rang up her sales. When Mary handed over the stack of coupons, the line groaned. 
 Counterfactual Context: When she paid for her groceries, she found she only saved $3.00.
Output (English): Then, Mary wheeled her cart out to the parking lot. A car waited for her parking spot while she loaded her groceries. When Mary pulled out, the car took her spot.