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: Leaky Pen. Sentence 1: John was walking around with a big stain on his pants. Sentence 2: He didn't notice until someone pointed it out. Sentence 3: John realized his pen had leaked in his pocket. Sentence 4: It ruined his pants. Choices: a. He had to throw them away and get another pair. b. They all wished they could go back home and watch their TV's.
Example Output: a

Example Input: Title: Speaking. Sentence 1: He was quite irritable. Sentence 2: He started speaking to me, so I looked up at him. Sentence 3: In the middle of talking, he snapped at me. Sentence 4: He demanded to know why I was looking at him. Choices: a. The sandwich looked disgusting by lunch time. b. I looked away, feeling hurt and angry.
Example Output: b

Example Input: Title: The Insurance. Sentence 1: Randy was very sick. Sentence 2: He went to the hospital to be treated. Sentence 3: When he got home, he got a huge bill. Sentence 4: His insurance had denied his claim! Choices: a. They all wished she'd be fired. b. Randy was stressed out and angry.
Example Output:
b