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: Anger. Sentence 1: Ivan was playing at a local tennis tournament. Sentence 2: And it was his turn to serve. Sentence 3: But he double faulted and became very angry. Sentence 4: And he threw is racket at the ground. Choices: a. Laurie had to hire a professional painter to finish the job. b. But Ivan felt regretful after being penalized.

Ex Output:
b

Ex Input:
Title: Ice Skating. Sentence 1: Tim was an athlete. Sentence 2: He had never been ice skating before. Sentence 3: He decided to go one day with his friends. Sentence 4: They went ice skating. Choices: a. Tim had fun ice skating for the first time. b. Now Tom is fluent in the Russian language!

Ex Output:
a

Ex 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.

Ex Output:
a