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: Bad trading day. Sentence 1: Fred was short the market. Sentence 2: He thought it was going down. Sentence 3: Unfortunately the opposite happened. Sentence 4: The market rallied. Choices: a. Jerry cried himself to sleep. b. Fred lost his money.
Example Output: b

Example Input: Title: The R Movie. Sentence 1: When I was a kid, my friends and I snuck into an R rated movie. Sentence 2: The movie was an obscure art film. Sentence 3: It was very boring. Sentence 4: My friends wanted to leave. Choices: a. It was malevolent cancer of the skin and she had nine months to live. b. We snuck out of the R rated movie.
Example Output:
b