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: Thirst. Sentence 1: John was very thirsty. Sentence 2: He asked his friend to buy him drinks. Sentence 3: He paid his friend five dollars to go to the store. Sentence 4: His friend got the drinks for John. Choices: a. John quenched his thirst. b. When he learned the details, though, he commended Nina for her choice!
Example Output: b

Example Input: Title: Old Bent Over Woman. Sentence 1: Vince noticed his neighbor bending over her flower garden. Sentence 2: She seemed to be in a lot of pain. Sentence 3: Vince offered to help her do the weeding. Sentence 4: His neighbor was very grateful for his help. Choices: a. She told him at her age weeding was too hard on her back. b. He is now considering starting his own BBQ business.
Example Output: b

Example Input: Title: Sad Birthday. Sentence 1: I planned a party for my birthday. Sentence 2: I invited people who I thought were my friends. Sentence 3: On the day of my birthday I eagerly waited for them to show up. Sentence 4: Nobody ever arrived at my party. Choices: a. This lingers as one of my most unhappy memories. b. His wife found the rug the next day.
Example Output:
b