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.

Example Input: Title: Movie Night. Sentence 1: Mark purchased two tickets for the nine o'clock show. Sentence 2: Mary saw him exit the line and headed to the concession. Sentence 3: Mark joined Mary on the concession stand line. Sentence 4: When it was their turn, they ordered refreshments. Choices: a. The food was a new food. b. Mark and Marty took their snacks into the theater.
Example Output: a

Example Input: Title: Bad Skyler. Sentence 1: Skyler could play many musical instruments well. Sentence 2: She decided to stop by the music store. Sentence 3: She picked up a saxophone and began to play it loudly. Sentence 4: The store manager frowned at her and shook his head. Choices: a. Skyler put down the saxophone and headed toward the drums. b. Susan was nearly thrown from the raft twice by the jerking.
Example Output: b

Example Input: Title: Sneaking Out. Sentence 1: Tracy was punished. Sentence 2: She decided to sneak out of her house. Sentence 3: Tracy climbed out of the window. Sentence 4: Her dog began to bark at her. Choices: a. Tracy's parents caught her leaving. b. I went home to digest what he had told me and formulate a plan.
Example Output:
b