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 seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

Example Input: Title: Fans of Clark. Sentence 1: A heat wave swept the city one summer. Sentence 2: Clark was concerned about his elderly neighbors. Sentence 3: They did not have air conditioning. Sentence 4: Clark bought several large fans for his neighbors. Choices: a. They were thankful to have some relief from the heat. b. She knit blue into the yarn blanket.
Example Output: a

Example Input: Title: Fred gets a package. Sentence 1: One day fred was sitting at home. Sentence 2: He was watching tv. Sentence 3: He hears the doorbell ring. Sentence 4: He slowly gets up and opens the door. Choices: a. Nothing is there but a package. b. Finally, he fished a lighter out of his pocket and lit the cigarette.
Example Output: a

Example Input: Title: Bay. Sentence 1: Amy loved the bay a lot. Sentence 2: She loved the view it produced. Sentence 3: One day, the bay was very dirty. Sentence 4: Amy spent a lot of time cleaning the bay. Choices: a. Now, the bay is clean once more. b. Green had to run very fast past the cemetery.
Example Output:
a