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: Rainy Day. Sentence 1: Tom had recently moved to a desert climate from Florida. Sentence 2: He rather liked the lack of rain at first. Sentence 3: But as the days turned to months, he missed the rain. Sentence 4: One evening he saw a news story that mentioned rain. Choices: a. His mouth guard ripped off a piece of his braces bracket. b. The following day, it rained all day - Tom smiled.
Output:
a