Definition: 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: Sentence 1: I saw a train set in the hobby shop. Sentence 2: It was smaller than a normal one. Sentence 3: My mom said that that would be my only Christmas gift. Sentence 4: I decided to not ask for it. Sentence 5: It would have been a waste of space. Choices: a. Train Set. b. cat.

a