Instructions: 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: Mistakes. Sentence 1: I made a huge mistake the other day. Sentence 2: While I was out jogging, I forgot to bring my phone. Sentence 3: I got a little lost and did not know how to get back. Sentence 4: I spent hours trying to get back home. Choices: a. Eventually I made it back home. b. They threw him a surprise birthday party.
Output:
b