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: Headache Medicine. Sentence 1: I had a grueling headache all day. Sentence 2: I asked several people for medicine. Sentence 3: When nobody had any, I was desperate to go to the store. Sentence 4: However, nobody could relieve me from my desk position. Choices: a. I sat with a headache for a while until someone brought me some. b. Brandon is looking forward to showing off his cooking skills.
Output:
b