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: Going to the Park. Sentence 1: Ken went to the park to walk around. Sentence 2: He needed to clear his head. Sentence 3: The air was crisp and the mood was lazy. Sentence 4: Ken enjoyed walking on the soft grass. Choices: a. It helped him get in a better state of mind. b. She got better but never made the same mistake again.
Example Output: b

Example Input: Title: The Plates. Sentence 1: Tina wanted some new dishes. Sentence 2: She found beautiful plates at the store. Sentence 3: She bought ten of them. Sentence 4: She set the table with them that night. Choices: a. They looked great! b. He had hopped on the wrong color train, and would be late.
Example Output: b

Example Input: Title: Facebook. Sentence 1: Tom was spending a lot of time on facebook. Sentence 2: Tom really enjoyed facebook. Sentence 3: Tom was getting poor grades in school. Sentence 4: Tom decided to quit facebook for a month. Choices: a. Luckily she realized she had given everyone the wrong time. b. Tom's grades went up during that month, he was happy.
Example Output:
a