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: Leaking ceiling. Sentence 1: Susy had a very large house. Sentence 2: Last week it snowed very badly. Sentence 3: She thought she got rid of all of the snow. Sentence 4: But unfortunately the roof leaked. Choices: a. So Susy had to call someone. b. They still preferred their own favorites, but their minds were opened!

Ex Output:
a

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: Garden. Sentence 1: Cath started a large garden in her backyard. Sentence 2: She spends every day tending to her vegetables. Sentence 3: Her produce reflects her passion. Sentence 4: Each veggie is large and ready to pick. Choices: a. Cath is enjoying her harvests. b. Pirya's favorite is the sunset over the water.

Ex Output:
a