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: Coffee aisle smell. Sentence 1: I was shopping for some coffee at a grocery store. Sentence 2: The grocery store had an aisle that sales coffee. Sentence 3: The aisle smelled really good. Sentence 4: I couldn't tell which coffee was what by the smell. Choices: a. John took the puppy home with him. b. I ended up grabbing a variety of coffee bags.
Example Output: a

Example Input: Title: Radio. Sentence 1: Don had a long drive ahead of him. Sentence 2: He turned on his radio station and listened to the radio host. Sentence 3: The radio host told funny stories and interesting anecdotes. Sentence 4: Don smiled and kept driving. Choices: a. The commute was much easier with the radio keeping him company. b. When we put everything together the party was a big hit!
Example Output: b

Example Input: Title: litter box. Sentence 1: Nancy was always yelling at her cat for spilling litter all over. Sentence 2: One day she say her child playing in the box. Sentence 3: The entire time her daughter was making the mess. Sentence 4: Nancy had to get a littler box with a cover. Choices: a. Her team cheered loudly for Ann. b. She no longer had to yell at anyone for making a mess with the litter.
Example Output:
a