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 felt weak after a very hard exercise class. Sentence 2: As a result I couldn't attend the same exercise class the next day. Sentence 3: I had to wait three days before I could return to the class. Sentence 4: After the soreness left my body, I was able to go back to class. Sentence 5: As a result, I had another very good class. Choices: a. Zucchini Pie. b. Exercise weakness.

b