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: Bailey gets a bug. Sentence 1: Bailey is out catching bugs. Sentence 2: She is having a hard time catching them. Sentence 3: She finally catches one. Sentence 4: She puts it into a jar. Choices: a. Brad was grounded and missed the concert. b. She feels sad for the bug and lets it go free.
Example Output: a

Example Input: Title: Egg Toss. Sentence 1: The fourth grade egg toss was down to two groups. Sentence 2: Bill gently tossed the egg to Sam, who caught it easily. Sentence 3: Jill threw hers to Molly who also caught it. Sentence 4: Both groups took two steps back. Choices: a. This time Sam's toss was too hard so the egg splattered on Bill. b. I'm really proud of how well I dance.
Example Output: b

Example Input: Title: Jimmy goes hiking. Sentence 1: Jimmy was a city boy who didn't get out much. Sentence 2: His friends decided to take him out to the country. Sentence 3: Jimmy and his friends decided to go hiking in the mountains. Sentence 4: It was very tough for Jimmy to reach the top. Choices: a. Jimmy finally manages to push his way to the top of the mountain! b. Mona made two new friends on her first day.
Example Output:
b