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: Stray Dog. Sentence 1: Lilly found a stray dog outside the door one morning. Sentence 2: Lilly asked her parents if they could keep the dog. Sentence 3: Her parents melted, saying yes. Sentence 4: Lilly cared for that dog with all her heart. Choices: a. Now, 5 years later, Lilly and that dog are absolutely inseparable. b. After a few moments, the bear finally left the campsite.
Output:
b