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: John goes to the store.. Sentence 1: John went to the store. Sentence 2: John wanted to buy tomatoes. Sentence 3: He looked everywhere for the tomatoes. Sentence 4: The store was sold out of fresh tomatoes. Choices: a. Kathie was treated for a mild concussion. b. John was sad, and went to another store.
Example Output: a

Example Input: Title: Therapy Time. Sentence 1: The couple had been having problems. Sentence 2: They turned to their therapist to help them. Sentence 3: The woman helped them talk about their problems. Sentence 4: They learned a lot about each other. Choices: a. Their relationship got a lot better. b. The day ended with me falling asleep by 9pm.
Example Output: b

Example Input: Title: Police. Sentence 1: I recently got in trouble with the police for a traffic stop. Sentence 2: But what took me by surprise, was how polite the officer was. Sentence 3: The news associated with them is they're very angry and this and that. Sentence 4: But he was nice, and even helped me out on a lesser charge. Choices: a. I drove off happily knowing that not all cops are bad. b. He had no explanation.
Example Output:
b