You will be given a definition of a task first, then some input of the task.
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.

Title: Lee Detector. Sentence 1: The police asked Lee to take a polygraph test. Sentence 2: Lee was under suspicion for arson. Sentence 3: Lee knew was innocent of the charges. Sentence 4: He took the polygraph exam. Choices: a. Lee gloated when he passed the polygraph test. b. Stan quit playing handball, and took up cycling instead.
Output:
b