Task: Story Composition
Input (English): Premise: LEo wanted to join the marching band. 
 Initial Context: He practiced twirling his baton often. 
 Original Ending: On tryout day, he felt confident about his chances. He made his best effort for the band. And to his joy, they let him join the band! 
 New ending: On tryout day, he felt insecure about his chances. He made his best effort for the band. And to his surprise, they let him join the band! 
Output (English): He thought he didn't have a chance so he didn't bother practicing.