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: I waited near my class before 10 minutes before it started. Sentence 2: When I placed my water bottle in my bag, the cap fell loose. Sentence 3: Some water soaked my lab notebook and other papers. Sentence 4: I quickly took it out. Sentence 5: Since my lab notebook was ruined, I had to throw it away. Choices: a. Breaking up. b. Bad Luck in an Instant.
Example Output: b

Example Input: Sentence 1: Tom had a heavy duty backpack. Sentence 2: It was so thick he did not like using it for small day trips. Sentence 3: Tom needed to purchase a new backpack. Sentence 4: .Tom purchased a smaller backpack. Sentence 5: Tom was very happy with his new and small backpack. Choices: a. Backpacks.. b. The Tackle Box.
Example Output: a

Example Input: Sentence 1: Harold enjoyed doing arts and crafts projects. Sentence 2: For autumn he decided to make a decorative scarecrow. Sentence 3: He ordered the supplies online. Sentence 4: He accidentally ordered a fifty-pound bag of straw instead of five. Sentence 5: Harold used it to make little scarecrows for the whole neighborhood. Choices: a. Arts and Crafts. b. Motorcycle Maintenance.
Example Output:
a