You will be given a definition of a task first, then some input of the task.
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.

Title: Adding Machine. Sentence 1: My wife's coworker has an adding machine. Sentence 2: It stopped printing tapes. Sentence 3: My wife called to order a new machine. Sentence 4: Her coworker wanted to get it replaced under warranty. Choices: a. The company reluctantly replaced the machine at no charge. b. They left and never realized her headphones were in the parking lot.
Output:
b