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.

Ex Input:
Title: Tennis. Sentence 1: Jan was playing tennis. Sentence 2: She was about to hit the ball when she missed. Sentence 3: However, the missed ball hit her in the head. Sentence 4: Jan thought she was okay but got dizzy. Choices: a. The doctor diagnosed Jan with a slight concussion. b. Joy had never been so embarrassed and luckily got a warning.

Ex Output:
b

Ex Input:
Title: Waving. Sentence 1: I sat on the bench in front of our building today. Sentence 2: My sister-in-law lives in the same building. Sentence 3: When she drives home she tries to wave at me on the bench. Sentence 4: Today she saw me and waved. Choices: a. I waved back, happily. b. Jean got the job.

Ex Output:
b

Ex Input:
Title: Taxes time. Sentence 1: Jenny didn't like to do her taxes. Sentence 2: She never understood the papers and they gave her a headache. Sentence 3: So that year, she decided to hire someone to do it for her. Sentence 4: She handed all the papers to her new accountant. Choices: a. His friends made fun of him. b. And she was pleasantly surprised to learn that she didn't have to pay.

Ex Output:
a