In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.

Example Input: Sentence 1: Karen was really afraid of being in a shark attack. Sentence 2: Her friends invited her to a trip to the beach, but she was nervous. Sentence 3: Karen stayed up all night reading about sharks to prepare for the trip. Sentence 4: The next day, Karen went with her friends to the beach. Sentence 5: Karen had a good time and was not attacked by a shark. Choices: a. 911. b. Sharks!.
Example Output: b

Example Input: Sentence 1: Roger was hungry. Sentence 2: He checked the fridge. Sentence 3: The fridge was empty. Sentence 4: Roger went to the store. Sentence 5: He came home with lots of food. Choices: a. Hunger. b. Noah's Arches.
Example Output: a

Example Input: Sentence 1: Tom was on his way to work. Sentence 2: He had to get there quickly. Sentence 3: But he was stuck in traffic. Sentence 4: It was taking forever. Sentence 5: Finally he had enough. Choices: a. Nice guy. b. Stuck in traffic.
Example Output:
b