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: New bike. Sentence 1: John just got a new bike that his dad gave him. Sentence 2: It was John's first bike. Sentence 3: So John called his friends up to go ride bikes. Sentence 4: They agreed to ride bikes. Choices: a. However, the kid punched him in the face and he was knocked out. b. So John all over town happy with his new bike.
Example Output: a

Example Input: Title: Vent. Sentence 1: Bob heard a knocking sound from the vent. Sentence 2: He peered inside to see what was the matter with it. Sentence 3: Looking back at him was the biggest moth he'd ever seen! Sentence 4: Bob got the fly swatter and swung it like a bat. Choices: a. The moth was smashed into a flat bloody splat! b. By the end of the day, Alfred knew ten new Chinese words.
Example Output: b

Example Input: Title: Dan lets his workers down. Sentence 1: Dan is a boss at his business. Sentence 2: Dan doesn't feel like working today. Sentence 3: Dan does not post work for his workers. Sentence 4: His workers are left without work. Choices: a. She realized she would need to go back to the expensive brand. b. Dan has let down all of his workers.
Example Output:
a