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: Large water slide. Sentence 1: Susie went to the local pool. Sentence 2: To her delight there was a water slide. Sentence 3: Susie was thrilled. Sentence 4: She went on it as she pleased. Choices: a. She soon became good enough to compete professionally. b. But she was yelled at because she did not alert the lifeguard.
Example Output: b

Example Input: Title: Find your Niche. Sentence 1: Maryann was made fun of in school for her looks. Sentence 2: She was tall, thin, and multiracial. Sentence 3: After she graduated high school, she moved to California. Sentence 4: She was signed to a modeling agency. Choices: a. Catherine felt better already. b. Now those same kids from school try to be her friend online.
Example Output: b

Example Input: Title: Peter. Sentence 1: Peter is a concierge in our building. Sentence 2: He is very friendly, especially to kids. Sentence 3: Our 2-year-old granddaughter from NY knows Peter. Sentence 4: Tonight she came from NY and asked where Peter was. Choices: a. Luckily the woman was able to drive Margaret to the hospital. b. He had gone home for the day.
Example Output:
b