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: Busted. Sentence 1: While his mom was in the shower, Tim put on a raunchy show. Sentence 2: He knew he wasn't allowed to watch it. Sentence 3: But he figured his mom would never know! Sentence 4: Then he heard her clear her throat angrily. Choices: a. Nathan couldn't wait to enjoy their engagement. b. She had snuck up on him and caught him!
Example Output: b

Example Input: Title: Robot Wars. Sentence 1: Kilo was an expert builder of battle robots and their weapons. Sentence 2: He was the top three fighter in the robot battle leagues. Sentence 3: He was due to compete for the spot of number one this week. Sentence 4: He build a special robot just in time for the competition. Choices: a. The convicts had their way with their home and tore it to pieces. b. He placed first and took the award home thanks to his genius robots.
Example Output: b

Example Input: Title: The Shed. Sentence 1: Jeremy wants do something with his empty yard. Sentence 2: He decides to build a shed. Sentence 3: He gathers the materials over the next month. Sentence 4: He then realizes it's too much work for just one person. Choices: a. The next week her credit score rose. b. He invites a bunch of friends over to help and it's done in no time.
Example Output:
b