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: Tom was driving home. Sentence 2: A squirrel jumped out in front of him. Sentence 3: Tom was caught off guard and tried to swerve. Sentence 4: He was barely able to avoid the squirrel. Sentence 5: Unfortunately he hit a tree in the process. Choices: a. Car Accident. b. Birch.
Example Output: a

Example Input: Sentence 1: Fred wakes up feeling pretty hungry. Sentence 2: He decides to eat a big muffin. Sentence 3: His muffin has blueberries in it. Sentence 4: Fred finishes the whole thing. Sentence 5: Afterwards, he no longer feels hungry. Choices: a. Fred Eats A Muffin. b. Bean.
Example Output: a

Example Input: Sentence 1: Callie was out with friends for dinner. Sentence 2: Her waiter hadn't been around to take their orders. Sentence 3: Callie and her friends had to place their orders with another waiter. Sentence 4: She saw their waiter leaning on the bar, playing on his phone. Sentence 5: Callie didn't leave the waiter a tip. Choices: a. Total relaxation. b. No Tip.
Example Output:
b