Definition: 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.
Input: Title: A new friend. Sentence 1: A friend of mine gave me a cat for my birthday. Sentence 2: She was fully grown and trained. Sentence 3: It took her a little time to learn her new home. Sentence 4: She is the best cat I have ever seen. Choices: a. The fair was the best one that he had been to. b. We are each other's new best friends.
Output:
a