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: The Museum. Sentence 1: Andy loved learning about things. Sentence 2: He went to a new museum to learn about history. Sentence 3: He looked at each exhibit. Sentence 4: At the end of it, he was impressed. Choices: a. He made apple pie to celebrate the accomplishment. b. The museum had done a wonderful job teaching him about history.

Ex Output:
a

Ex Input:
Title: Posters. Sentence 1: Hannah was running for the student council at her school. Sentence 2: She asked her friends to help her put up posters. Sentence 3: Her friends spent the afternoon helping. Sentence 4: The next morning, they found many posters in the trash. Choices: a. Hannah reported what happened to the principal. b. Bea was so happy to help out by starting the recycling efforts.

Ex Output:
b

Ex Input:
Title: Sarah finds gold. Sentence 1: Sarah is playing in her front yard. Sentence 2: She trips over something. Sentence 3: She looks to see what it is. Sentence 4: She digs it up. Choices: a. She finds a big chest with gold inside. b. Tom spent a long time paying them back for it.

Ex Output:
b