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: Geometry Test. Sentence 1: Kyle has a geometry test in the morning. Sentence 2: He thought he knew all the formulas. Sentence 3: When he got to the test, his mind went blank. Sentence 4: He was not able to answer any questions. Choices: a. He had to turn his paper in blank. b. He didn't answer it.

Ex Output:
a

Ex Input:
Title: New frontier. Sentence 1: Kelley loved the outdoors. Sentence 2: She decided to move to a place where that was fostered. Sentence 3: She packed her stuff and went on the road. Sentence 4: When she arrived in Colorado she decided to stay. Choices: a. She made a thousand at the end of the day. b. It was great for her.

Ex Output:
b

Ex Input:
Title: Physics. Sentence 1: Mark got a degree in physics. Sentence 2: He got a job at Nasa. Sentence 3: Mark realized he disliked math though. Sentence 4: He went to the bathroom and hid the whole day. Choices: a. Mark realized that no one even noticed he was gone. b. She eventually was able to after much difficulty.

Ex Output:
a