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: Shoes. Sentence 1: Kate loved to buy shoes. Sentence 2: She had over 100 pairs. Sentence 3: One day she decided to give some away. Sentence 4: She was glad she was able to help other people. Choices: a. Everyone loved the cookies, and that was the start of her business. b. She decided to keep on helping others.
Example Output: b

Example Input: Title: Flap. Sentence 1: The flap hung down at an odd angle. Sentence 2: The seamstress bought new material to replace it. Sentence 3: She ripped off the old flap. Sentence 4: She sewed on the new piece she'd cut out. Choices: a. She smiled with satisfaction at the job well done. b. Jodie decided not to ski and used her afternoon to build a snowman.
Example Output: a

Example Input: Title: Book. Sentence 1: Tom wanted to write a book. Sentence 2: He found himself preoccupied with other tasks. Sentence 3: He never got around to writing it. Sentence 4: One day he decided he was not going to do anything but write. Choices: a. He wrote and wrote, until he finally finished the book. b. I told my wife it was a nice thing to do.
Example Output:
a