Given the task definition and input, reply with output. 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'.

Sentence 1: When I was a kid, my bike got stolen. Sentence 2: However, I had hidden my name underneath the handlebar cover. Sentence 3: I saw a kid with a spray-painted bike that resembled mine. Sentence 4: I went up to him and confronted him. Sentence 5: He ran away when I pulled the handlebar cover and saw my name there. Choices: a. New Boss. b. Stolen Bike.
b