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 heard a knock on the door a little while ago. Sentence 2: I looked out the window and saw an old friend. Sentence 3: He was always trouble and not fun to be around. Sentence 4: I did not want to talk to him. Sentence 5: I was really quiet and pretended not to be home so he left. Choices: a. Old friend.. b. Swarley.

a