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: Bookshelf. Sentence 1: Spencer was moving. Sentence 2: He tried to lift the bookshelf. Sentence 3: The bookshelf fell down. Sentence 4: It broke all over. Choices: a. He walked back in because it was cold. b. Spencer bought a new one.
Example Output: b

Example Input: Title: Bad tooth. Sentence 1: Nolan had a bad tooth. Sentence 2: But he refused to go to the dentist. Sentence 3: As the pain was getting more intense every day, he had no choice. Sentence 4: He called for an emergency appointment. Choices: a. When the tooth was out, Nolan was grateful to be pain-free. b. The bad news is they don't have a single dress above a size 5.
Example Output: a

Example Input: Title: Melted Ice Cream. Sentence 1: Larry bought ice cream for him and his friend.s. Sentence 2: It was a really hot day out. Sentence 3: A lot of the ice cream melted. Sentence 4: Larry ate what he was able to. Choices: a. His friends appreciated the gesture. b. They wound up taking it away.
Example Output:
a