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: Call Center. Sentence 1: Tom had recently graduated college and was unemployed. Sentence 2: Tom desperately needed a job. Sentence 3: Tom applied everywhere. Sentence 4: Tom applied to a position at a call center. Choices: a. Tom was hired there and very happy about it. b. He finally started winning tournaments.

Ex Output:
a

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: Charlie's Record Collection. Sentence 1: Charlie loved collecting rare record albums. Sentence 2: He found an out-of-the-way store that had tons of oldies. Sentence 3: He spent hours looking through the stacks of rare albums. Sentence 4: Charlie spent several hundred dollars there on some great finds. Choices: a. At home, he spent the day listening to his collection's new additions. b. He would have to return it.

Ex Output:
a