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: Hyro ran a marathon and did very well. Sentence 2: But the next day, his knee was very stiff. Sentence 3: He applied an ice pack and compression bandage. Sentence 4: Then he elevated it. Sentence 5: After a few hours, Hydro's knee felt better. Choices: a. Chess Champ. b. Stiff.

b