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: Mark's new hobby was buying and selling stocks. Sentence 2: He would watch CNBC all day, every day. Sentence 3: He usually lost money. Sentence 4: One day, he made a few thousand dollars on a hunch. Sentence 5: He'll probably lose it all tomorrow. Choices: a. Buy and Sell. b. Paradise.

a