Task: Story Composition
Input (English): Premise: I want to learn how to play guitar. 
 Initial Context: I bought my own guitar to learn how to play. 
 Original Ending: I spent weeks and weeks practicing. I'm still not very good at playing. I think one day I'll be good at playing guitar. 
 Counterfactual Context: I'm saving some money so I can buy a guitar one day.
Output (English): I spent weeks and weeks saving my money. I'm still not very good at saving my money. I think one day I'll be good at saving.