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.

Ex Input:
Title: Canadian Vacation. Sentence 1: I live in the northern central United States. Sentence 2: Despite the proximity, I have never visited Canada. Sentence 3: My family are planning next year's vacations. Sentence 4: I put in my vote to see some parts of Canada. Choices: a. I was outvoted and Canada would have to wait. b. Ron left and was very disappointed.

Ex Output:
a

Ex Input:
Title: Destroyed Engine. Sentence 1: Tom was at a quarter mile track. Sentence 2: He was going to race a friend. Sentence 3: He really wanted to win. Sentence 4: Tom decided to spray way too much nitrous. Choices: a. He won but it destroyed his engine. b. Everyone enjoyed the movie.

Ex Output:
a

Ex Input:
Title: The Movie. Sentence 1: The kids huddled around the tv. Sentence 2: They were going to watch their favorite movie. Sentence 3: The opening credits started and they got very excited. Sentence 4: They loved movie night! Choices: a. We snuck out of the R rated movie. b. They stayed up late to finish it.

Ex Output:
b