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: Consider Input: Title: Piano Struggle. Sentence 1: Leo was trying to learn a piano piece he liked. Sentence 2: But it was too advanced for him. Sentence 3: Nevertheless, he practiced it everyday for weeks. Sentence 4: But when his piano teacher heard, he suggested practicing the basics. Choices: a. The other driver's insurance paid for the damage. b. After practicing easier pieces for months, everything became easier.

Output: a

Input: Consider Input: Title: Mistaken Identity. Sentence 1: Joe was walking down the street minding his own business. Sentence 2: All of a sudden a police officer was grabbing him. Sentence 3: The officer said he matched the description of a bank robber! Sentence 4: Joe knew it was a mistake but was still afraid. Choices: a. Fortunately he had an alibi for the time of the crime so was let go. b. It was just a big truck driving by!

Output: b

Input: Consider Input: Title: Tuna. Sentence 1: Jim was a seafood restaurant. Sentence 2: But he was worried about eating too much mercury. Sentence 3: So he ordered salmon to eat. Sentence 4: But his waiter brought tuna by mistake. Choices: a. We still make fun of him to this day. b. And Jim reluctantly ate through the dish.
Output: a