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: Surprise Party. Sentence 1: Tom had a birthday coming up. Sentence 2: His friend told him about his girlfriend's idea of a surprise party. Sentence 3: Tom was expecting it for weeks. Sentence 4: When he went to get dinner with his girlfriend he was sure of it. Choices: a. The mom put that one next to the first one. b. He got back home to an empty house full of disappointment.
Output:
a