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: Swimming Lessons. Sentence 1: Kim loved the beach. Sentence 2: She was just afraid of the water. Sentence 3: She decided to take swimming lessons. Sentence 4: They were all at a pool but they helped. Choices: a. The dog caused the man to crash his bike. b. Kim had more confidence to go into the ocean.
Output:
a