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: Spoiled milk. Sentence 1: Kelsi went downstairs for breakfast. Sentence 2: She poured a bowl of cereal. Sentence 3: She then got the milk. Sentence 4: But after pouring it she saw it was thick and curdled. Choices: a. A decade later, he was directing Hollywood features. b. Kelsi had to throw it out and get another one.

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: Jumping. Sentence 1: Abe was trying to focus on his tasks. Sentence 2: He heard loud bouncing from above him. Sentence 3: The neighbor's kids were at it again. Sentence 4: Abe rolled his eyes and called the apartment manager. Choices: a. Tommy made sure not to be late again. b. He told her he'd decided not to renew his lease.

Ex Output:
b