You will be given a definition of a task first, then some input of the task.
In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.

Title: The Gymnast. Sentence 1: Liv wanted to be an Olympic gymnast. Sentence 2: She trained every day after school. Sentence 3: Unfortunately, she was injured in a car accident. Sentence 4: She had to undertake months of physical therapy to heal her ankle. Choices: a. Eventually, she was back to practicing gymnastics. b. Luckily, the phone was still covered under warranty.
Output:
b