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: There lived a lonely old man by the name of Samuel who caught dogs. Sentence 2: He was not paid to do it nor had to, he just enjoyed catching dogs. Sentence 3: No one knows what happened to the dogs once he caught them. Sentence 4: They believed it was a good service since the dogs were a stray. Sentence 5: Police finally arrested him and revealed he was using dogs as food. Choices: a. The Catcher. b. Floss.
a