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.

Ex Input:
Title: Tooth. Sentence 1: Patty had a sore tooth. Sentence 2: From childhood, Patty had a fear of the dentist. Sentence 3: Patty found a local dentist that provides sedation dentistry. Sentence 4: Patty went into have her tooth fixed. Choices: a. She knew she could eat this everyday. b. Patty did not remember a thing and was so happy.

Ex Output:
b

Ex Input:
Title: The Seashore Song. Sentence 1: Once, there lived a brother and sister who lost their family. Sentence 2: They were so sad. Sentence 3: They prayed for a sign that their parents were watching them. Sentence 4: One day, they went to the beach. Choices: a. When they heard the ocean's song, they knew their parents were there. b. They were pumped up and ready to play!

Ex Output:
a

Ex Input:
Title: Mint. Sentence 1: Katherine loved to chew on mints. Sentence 2: She loved having a fresh breath. Sentence 3: One day, Katherine ran out of mints. Sentence 4: She had to quickly run to the store and buy more. Choices: a. Then, Katherine was able to keep her breath fresh for the day. b. Finally, he rushed to the store and bought more eggs.

Ex Output:
a