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: The Railing. Sentence 1: The family lived on the second level. Sentence 2: The stairs had a wobbly railing attached to them. Sentence 3: The family begged their landlord to replace it. Sentence 4: He always refused. Choices: a. She loved the cup, nonetheless. b. The parents warned the kids about how unsafe it was.
Example Output: b

Example Input: Title: The Athlete. Sentence 1: There once was a runner who was great at his sport. Sentence 2: He could outrun everyone. Sentence 3: However, his son grew up to be almost as fast as him. Sentence 4: When he finally raced his son, he cheated to win. Choices: a. It turns out, I could easily afford the new place. b. He felt awful in the end.
Example Output: b

Example Input: Title: Rachel's Baby. Sentence 1: Rachel was very pregnant with her firstborn child. Sentence 2: When she finally went into labor, she was 3 weeks overdue. Sentence 3: She went to the hospital for a painful delivery. Sentence 4: The baby spent 2 weeks in the NICU because of illness. Choices: a. Now, Rachel and the baby are healthy and home together. b. Ashley went home to read up on the diagnosis and decided it fit.
Example Output:
a