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: Pesto. Sentence 1: The family grew lots of basil in their garden. Sentence 2: They picked it and put it in a food processor. Sentence 3: They blended it up with cheese and olive oil. Sentence 4: It made some delicious pesto. Choices: a. It turns out this hair dye was marked wrong and her hair is pink now. b. They couldn't wait to cook with it!
Example Output: b

Example Input: Title: Snow Day. Sentence 1: Stephen saw the snow come down. Sentence 2: He waited for a phone call. Sentence 3: The school called. Sentence 4: They said school was closed. Choices: a. Stephen celebrated. b. We all went home very happy.
Example Output: a

Example Input: Title: Slow Jogger. Sentence 1: I decided to jog with some friends. Sentence 2: Unfortunately, I was always the slowest. Sentence 3: I decided to practice hard every morning. Sentence 4: I practiced jogging for a month. Choices: a. Soon, I was faster than all of my friends. b. Phil got his car fixed, and went and saw his son.
Example Output:
a