Task: Story Composition
Input (English): Premise: Casey was thirsty for something to drink. 
 Initial Context: He had checked the refrigerator to find nothing available. 
 Original Ending: Casey decided to make a trip to the store. He bought a case of water. Casey now has water to last him a week. 
 Counterfactual Context: He had checked the refrigerator to find it full of bottles of water.
Output (English): Casey decided to make a trip to the store. He bought a case of soda. Casey now has soda to last him a week.