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: Trail Mixer. Sentence 1: Bob bought a new kind of tropical trail mix. Sentence 2: When it arrived he ate a handful. Sentence 3: Bob's hands grabbed another scoop on their own accord. Sentence 4: Before he knew it, he'd eaten half the bag! Choices: a. Bob ordered another bag of it before his hands could grab any more. b. Within a few months, he had lost 40 pounds.
Example Output: a

Example Input: Title: Dropping Out. Sentence 1: Tom was doing poorly in college. Sentence 2: He was unable to turn things around. Sentence 3: He wound up dropping out. Sentence 4: Tom took some time off before returning. Choices: a. He did much better the second time. b. So we decided to make it a funny hat party.
Example Output: a

Example Input: Title: Lucy's First Day. Sentence 1: Lucy was excited to go to school. Sentence 2: Today was her first day of kindergarten! Sentence 3: She met her new teacher and classmates. Sentence 4: Lucy loved getting to know her new school. Choices: a. That night, she told her parents all about her day. b. Tom ran up the stairs as fast as he could.
Example Output:
a