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: Fans of Clark. Sentence 1: A heat wave swept the city one summer. Sentence 2: Clark was concerned about his elderly neighbors. Sentence 3: They did not have air conditioning. Sentence 4: Clark bought several large fans for his neighbors. Choices: a. They were thankful to have some relief from the heat. b. She knit blue into the yarn blanket.

Ex Output:
a

Ex Input:
Title: Blind dancer. Sentence 1: Tom was blind. Sentence 2: He loved to dance. Sentence 3: He practiced dancing every day. Sentence 4: He took part in a dance competition. Choices: a. He became the first blind person to win the competition. b. Now she still misses her old home, but the ocean is now her new home.

Ex Output:
a

Ex Input:
Title: The Bat. Sentence 1: The family saw something fly through the living room. Sentence 2: It was a bat! Sentence 3: They all screamed and ran around. Sentence 4: The dad cornered the bat in a closet. Choices: a. Right there before her eyes was a brand new car complete with a bow. b. He scooped it up in a bucket and threw it outside.

Ex Output:
b