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: The Donut Shop. Sentence 1: I opened a Donut shop in my town. Sentence 2: On the day of the grand opening, no one came. Sentence 3: I waited for 8 hours. Sentence 4: I didn't have any customers. Choices: a. Then I realized I probably should have told someone about it. b. His friends said they wanted to surprise Bob for being a good friend.
Output:
b