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: The Dead Bug. Sentence 1: Paul saw something floating in his soup. Sentence 2: It was a disgusting dead bug! Sentence 3: Paul screamed and called for a waiter. Sentence 4: The waiter took the bowl away. Choices: a. He apologized and paid for the meal. b. He then landed the plane without injury to any passengers.
Example Output: b

Example Input: Title: App Updates. Sentence 1: Nina needed to access her phone as quickly as possible. Sentence 2: She was about to make an urgent call when something popped up. Sentence 3: Suddenly dozens of apps began updating themselves. Sentence 4: By the time the downloading stopped it was too late. Choices: a. Tony decided to quit his job right then and there. b. Nina had to find a different phone to make her call.
Example Output: a

Example Input: Title: Missed Lessons. Sentence 1: Carla's girls were supposed to take piano lessons on Tuesday mornings. Sentence 2: However, her husband decided to take the family out of town this week. Sentence 3: Carla was excited to do something different for a change. Sentence 4: The family went to Albuquerque to visit their relatives. Choices: a. No one missed piano lessons except the teacher they forgot to call. b. He couldn't believe it when he won unanimously.
Example Output:
b