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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.

Example Input: Title: Rap Battle. Sentence 1: One day some kids at school decided to have a rap battle. Sentence 2: Alec and Ron faced off. Sentence 3: People voted for who they thought should win. Sentence 4: Everyone voted for Alec. Choices: a. Alec won the battle. b. So she decided to eat just butter despite her weight.
Example Output: b

Example Input: Title: A rainy day at the fair. Sentence 1: Sam and his family went to the local town fair one Saturday. Sentence 2: It was hot and humid but they tried to have fun anyway. Sentence 3: Sam went on a few rides and played a few games. Sentence 4: Suddenly it became very dark and the humidity broke. Choices: a. Sam and his family ran to the car getting soaked by the rain. b. The kids cried to stay and play.
Example Output: b

Example Input: Title: Arrival. Sentence 1: The doctor showed up the next morning. Sentence 2: He said the baby had been stuck in her hip. Sentence 3: He would have to do a cesarean section. Sentence 4: They wheeled her into surgery. Choices: a. Tom always has a fun time at Medieval Times. b. The mother sighed with relief.
Example Output:
a