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: Return Fire. Sentence 1: A couple of people gathered in the parking lot. Sentence 2: They ignited a few fireworks. Sentence 3: Dan had to reignite some of them. Sentence 4: However, he got burned by one of the sparks. Choices: a. The officer immediately arrested him. b. His mom took him to the hospital to get a few stitches.
Example Output: b

Example Input: Title: Summer Job. Sentence 1: John wanted to buy a new video game. Sentence 2: His parents didn't want to give him them money. Sentence 3: His mother suggested to get a summer job. Sentence 4: John spent the summer mowing lawns. Choices: a. At the end of the summer, John had enough money to buy four games! b. Bobby's father had to take Bobby to school every morning.
Example Output: a

Example Input: Title: Better Grades. Sentence 1: The brothers took an acting class. Sentence 2: They worked on everything together. Sentence 3: They thought they would get the same grade. Sentence 4: One of the brothers got a better grade than the other. Choices: a. The one with the better grade teased his brother. b. Zach reminded him that it was birthday paper for Jesus.
Example Output:
a