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: Waiting in line for the autograph. Sentence 1: We finished the concert. Sentence 2: Afterwards my mom wanted an autograph. Sentence 3: I told her I would stay in line with her. Sentence 4: So I did without a problem. Choices: a. The dad bought it for one dollar. b. She got an autograph very quickly.

Ex Output:
b

Ex Input:
Title: Fruit Trees. Sentence 1: There was a town that was famous for peach trees. Sentence 2: The residents loved the peach trees. Sentence 3: One day a visitor decided to chop down the peach trees. Sentence 4: The visitor replaced the trees with apple trees. Choices: a. The residents realized that they loved apple trees too. b. The sisters combined their talents to create a successful business.

Ex Output:
a

Ex Input:
Title: Wrong Bottle. Sentence 1: Tim was drinking tea. Sentence 2: It was brown in a glass bottle. Sentence 3: There were others around it. Sentence 4: Tim picked up the wrong bottle. Choices: a. What was inside was gross to him. b. The officer received a commendation for saving a family heirloom.

Ex Output:
a