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'.

Input: Consider 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.

Output: a

Input: Consider Input: Sentence 1: Allie was getting engaged. Sentence 2: She told all her friends. Sentence 3: They were not happy for her. Sentence 4: Allie was so disappointed. Sentence 5: She then realized maybe they were not true friends. Choices: a. Tripping over the gown. b. Not happy for the engagement.

Output: b

Input: Consider Input: Sentence 1: Tyson had bought a cheap brand of trash bags. Sentence 2: He was taking the trash out one day. Sentence 3: The trash bag busted open. Sentence 4: Tyson had to clean up a huge mess. Sentence 5: Tyson went to the store and bought better trash bags. Choices: a. Trash Bags. b. Lonely elders.
Output: a