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 seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

Example Input: Title: Cat. Sentence 1: My cat and I moved to a new apartment. Sentence 2: I loved my new apartment, but my cat didn't. Sentence 3: He would often hide in a closet or under the bed to show his anger. Sentence 4: One day, I called for him but couldn't find him anywhere. Choices: a. I think he ran away, because I never saw him again. b. Claire brought the trash out.
Example Output: a

Example Input: Title: First Rodeo. Sentence 1: Tom had never gone to a rodeo before. Sentence 2: His friends invited him to one. Sentence 3: He wound up really enjoying it. Sentence 4: Tom went back often. Choices: a. Eventually he even got to be part of some shows. b. Aaron ate the food later.
Example Output: a

Example Input: Title: The Art Museum. Sentence 1: The museum had closed for the week. Sentence 2: They were getting a very famous work of art installed. Sentence 3: It would have a designated security guard and a lot of alarms. Sentence 4: It prepared to reopen a few days later. Choices: a. Steve called and was told the cord would arrive in two business days! b. A crowd had already formed outside.
Example Output:
b