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: The new company went public. Sentence 2: They announced new shares. Sentence 3: I bought some. Sentence 4: I was happy to be invested. Sentence 5: I made 10 percent. Choices: a. The rainy day. b. New stock.

b