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: Sandy loves to kayak. Sentence 2: She will spend hours on the water if she can. Sentence 3: Once, she forgot her sunscreen. Sentence 4: She was enjoying herself so much, she didn't even notice at first. Sentence 5: When she got home, she found her shoulders were badly burned. Choices: a. Wacky Piano. b. Sunburn.
b