Given the task definition and input, reply with output. 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 Mooch. Sentence 1: Our dog, Mooch, volunteered to live with us so we never fenced him in. Sentence 2: He would go for a daily walk up the road and come back. Sentence 3: We never knew where he went until one day our neighbor came by. Sentence 4: It turned out he would stop and beg all the neighbors for a snack. Choices: a. That is when we realized Mooch was a perfect name for him. b. He put the money into his pocket.
b