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.

Ex Input:
Title: Ice Cream Crazy. Sentence 1: I have always absolutely loved ice cream. Sentence 2: For my birthday one year, my mom bought me an icecream machine. Sentence 3: My roommate and I decided to make ice cream together and were excited. Sentence 4: We froze the canister, mixed the ingredients, and let them churn. Choices: a. His parents had to explain reality to him. b. We waited and waited and to our dismay we never got ice cream.

Ex Output:
a

Ex Input:
Title: Pam Discovers Authentic Mexican Cuisine. Sentence 1: Pam never cared much for Mexican food. Sentence 2: She would go to a Mexican restaurant if her friends really wanted to. Sentence 3: One day, they went to a new place with more authentic Mexican cuisine. Sentence 4: Pam loved the authentic style with its creamy cheese and milder sauce. Choices: a. Sushi is Kole's new favorite food. b. She realized it was the Americanized version she didn't care for.

Ex Output:
a

Ex Input:
Title: A Great Action. Sentence 1: The president has received a Letter. Sentence 2: The letter described a powerful weapon called an atom bomb. Sentence 3: The President agrees with the author that the US should develop it. Sentence 4: The President orders the Army to oversee development of an atom bomb. Choices: a. The Army created the Manhattan Project to carry out the order. b. Max was punished and put in time out.

Ex Output:
b