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: Great date. Sentence 1: Lisa went on a date with Lewis. Sentence 2: She was excited to go on it. Sentence 3: When the two met at the restaurant it was great. Sentence 4: They had amazing chemistry. Choices: a. Lisa wanted to be with him again. b. Lucy screamed and tried to kill it.
Example Output: a

Example Input: Title: The Bat. Sentence 1: One evening at dusk James was outside on the deck with his family. Sentence 2: He looked to them and said he would show them a trick. Sentence 3: James balled up a pair of white socks. Sentence 4: He then threw them into the air and a small black bat swooped by. Choices: a. She had to drive all the way to the market to finally finish her cake. b. The whole family gasped and James smiled.
Example Output: b

Example Input: Title: Website Optimization. Sentence 1: Harry found his website was running slow. Sentence 2: He compressed and shrunk his images. Sentence 3: He minified many of his stylization files. Sentence 4: He reduced the number of requests to the server. Choices: a. Ultimately the slowdown was a server error unrelated to his efforts. b. It was a great first day of vacation.
Example Output:
a