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: Kayla had a hamster named Brownie. Sentence 2: Kayla liked to let Brownie out of his cage so she could hold Brownie. Sentence 3: Kayla put Brownie back in his cage and left. Sentence 4: When Kayla came back, the cage door was open and Brownie was gone. Sentence 5: Kayla looked and looked, but she never found Brownie. Choices: a. Socks. b. Brownie Gets Out.

b