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: 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: Bonsai boy. Sentence 1: When Jack was young he wanted to be a bonsai master. Sentence 2: When he was 18 he moved to Japan to pursue his dream. Sentence 3: He studied under bonsai masters from Asia and Europe. Sentence 4: When he came home he used his new knowledge to start a bonsai nursery. Choices: a. When it rained again that week she counted backwards and it worked. b. He is extremely happy now, surrounded by bonsai everyday.
Example Output: b

Example Input: Title: The Flying Saucer. Sentence 1: Evan concluded that aliens must exist. Sentence 2: He was looking at the sky in his telescope one night. Sentence 3: As he looked through the scope, he noticed a large disc shaped object. Sentence 4: Evan gasped realizing it must be a flying saucer. Choices: a. He heard laughing and saw his friend holding a paper plate. b. She almost stepped on it.
Example Output:
a