Task: Story Composition
Input (English): Premise: Mario grew Christmas trees in his yard instead of buying them. 
 Initial Context: This year he found a bird in one of his trees as he was cutting it. 
 Original Ending: Mario felt bad for the bird and spared the tree. He then went out to buy a fake tree instead. He is much happier with his choice now. 
 New ending: Mario felt bad for the squirrel and spared the tree. He then went out to buy a fake tree instead. He is much happier with his choice now. 
Output (English): This year he found a squirrel in one of his trees as he was cutting it.