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: Shark Danger. Sentence 1: Blair was surfing in the ocean. Sentence 2: He spotted a large fin in the water. Sentence 3: He got very scared. Sentence 4: He paddled to the shore. Choices: a. She was never going to endure that pain again! b. The shark swam away from the beach.
Output:
a