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: Stan's Best Friend. Sentence 1: Stan and his best friend have been friends for 8 years. Sentence 2: They met when Stan was in first grade. Sentence 3: They play games together, ate together, and watched movies together. Sentence 4: Their favorite time of day is when Stan gets home from school. Choices: a. Stan's best friend is always waiting for him with a wagging tail. b. The family thinks she should start paying rent.
Output:
b