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: Radio Hit. Sentence 1: As a joke, Roy requested an unpopular song to the radio station. Sentence 2: At first the DJ refused. Sentence 3: Roy called back from different phones and disguised his voice. Sentence 4: The DJ began to think that this song was actually worth playing. Choices: a. After the 25th call in, the DJ played the song for Roy. b. He decided to leave the rest for someone else.

Ex Output:
a

Ex Input:
Title: The Comedian. Sentence 1: Johnny always liked making people laugh. Sentence 2: He saw a flyer for amateur comedy contest at the club. Sentence 3: He signed up to perform his comedy routine. Sentence 4: For two weeks, he practiced his routine for his friends and family. Choices: a. Mary came up with the right answer and her team celebrated! b. Johnny won first place in the competition.

Ex Output:
b

Ex Input:
Title: The very toxic fumes. Sentence 1: Roy had a very dirty bathroom. Sentence 2: So he bought some industrial grade cleaners to clean it. Sentence 3: His mother warned him about the dangers of such chemicals. Sentence 4: He used the chemicals with no care. Choices: a. He ended up passing out and going to the doctor. b. She spends the rest of the day online shopping.

Ex Output:
a