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: Quite in the Library. Sentence 1: Earl was studying in the library. Sentence 2: Earl was patiently waiting, when a student started screaming. Sentence 3: Earl quickly turned around, and told the student to be quiet. Sentence 4: The student refused and continued to scream loudly. Choices: a. Dan was disappointed that he did not find anything at the mall. b. Earl decided it was best to leave the library, and study elsewhere.

Ex Output:
b

Ex Input:
Title: Clean the Basement. Sentence 1: Kate wanted to make the musty basement more comfortable. Sentence 2: She spent hours sweeping and mopping. Sentence 3: Spraying air freshener didn't help. Sentence 4: She tried burning scented incense to cover the smell. Choices: a. After all that the basement still smelled like a basement. b. From then on, I gave my opinions more gently.

Ex Output:
a

Ex Input:
Title: Hearing. Sentence 1: Tom was a student at middle school. Sentence 2: There was a health fair at his school. Sentence 3: He decided to get his hearing checked. Sentence 4: He really enjoyed the testing process. Choices: a. He was happy to learn he was in perfect health. b. Cal and his friend met up at a diner instead.

Ex Output:
a