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: Lengthy sleepover. Sentence 1: Tina invited her friend Ann to come sleepover. Sentence 2: She hadn't seen Ann in ages and wanted to hang with her. Sentence 3: Ann said okay and she ended up staying two nights. Sentence 4: But she had forgotten to tell her parents about it. Choices: a. As a result she got grounded for not telling them. b. They all said it was because his references said he was mean.
Example Output: a

Example Input: Title: Library. Sentence 1: Paxton's mom dropped him off at the public library. Sentence 2: Paxton browsed the books in the nonfiction section. Sentence 3: He found a book about Ancient Egypt. Sentence 4: Paxton carried the book to the checkout counter. Choices: a. He gave his library card to the woman behind the counter. b. Grant had gotten a hole in one!
Example Output: a

Example Input: Title: The Sizzle. Sentence 1: Gus put some bacon on a cold pan and turned on the heat. Sentence 2: There was a knock at the door so he went to open it. Sentence 3: At the door was a salesman who sold life insurance. Sentence 4: Gus got so involved with him that he forgot about the bacon. Choices: a. When the bacon began to sizzle, Gus heard it and remembered the bacon. b. It turned out the delivery man went to the wrong house.
Example Output:
a