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: Return Fire. Sentence 1: A couple of people gathered in the parking lot. Sentence 2: They ignited a few fireworks. Sentence 3: Dan had to reignite some of them. Sentence 4: However, he got burned by one of the sparks. Choices: a. The officer immediately arrested him. b. His mom took him to the hospital to get a few stitches.

Ex Output:
b

Ex Input:
Title: Hiking. Sentence 1: Eric was planning to go solo hiking today. Sentence 2: He packed snacks and a lot of water the night before. Sentence 3: In the morning he headed out very early because the drive was long. Sentence 4: He gets there and there was already a ton of people. Choices: a. He ends up meeting a friend there and they hike together. b. I filled it up before I returned it so it would not happen to her too.

Ex Output:
a

Ex Input:
Title: Tripping Over Toys. Sentence 1: Ryan was running down the steps at his house. Sentence 2: His sister had left a toy on one of the steps. Sentence 3: Ryan tripped on the toy and fell. Sentence 4: He sprained his ankle. Choices: a. Eventually Bella fixed the jeans. b. Ryan's sister got in trouble for leaving her toys out.

Ex Output:
b