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: Pinball Machine. Sentence 1: Sam was at the local bar. Sentence 2: They had a pinball machine. Sentence 3: He loved playing those. Sentence 4: Sam got quarters and started to play. Choices: a. In the car, the cousins happily planned the week's activities. b. He was so good a small crowd started to gather around him.

Ex Output:
b

Ex Input:
Title: Books. Sentence 1: Tom was a freshman in college. Sentence 2: He was struggling financially. Sentence 3: He needed to buy books for the new semester. Sentence 4: He could not afford the physical text books. Choices: a. He felt so relieved. b. He purchased the eBook versions and saved money.

Ex Output:
b

Ex Input:
Title: Fred sells car. Sentence 1: Fred is in need of some money. Sentence 2: He has an extra car. Sentence 3: He decides he needs to sell it. Sentence 4: Fred finds a buyer. Choices: a. Emma's hair was perfectly straight and shiny! b. Fred sells his car.

Ex Output:
b