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: Accident. Sentence 1: The teacher began her lesson. Sentence 2: A student asked to use the restroom. Sentence 3: The teacher refused the request. Sentence 4: The student had an accident. Choices: a. The parents of the student sued the school. b. I didn't want to leave when it was time.
Example Output: a

Example Input: Title: The Toy Train. Sentence 1: The men loved playing with their toy trains. Sentence 2: They built tracks and bridges. Sentence 3: The model railroads were very intricate systems. Sentence 4: The men had great plans for the future. Choices: a. They wanted to expand the railroad across the whole yard. b. Edward was able to become the star of the soccer team.
Example Output: a

Example Input: Title: Absentee Ballot. Sentence 1: I am a permanent vote-by-mail voter. Sentence 2: I used to always go to a polling place. Sentence 3: Until one year when my work held me very late on election day. Sentence 4: It was an election that really mattered to me. Choices: a. Richard soldiered on year-round, believing his company to be noble. b. I figured this way I can never miss another vote.
Example Output:
b