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: My friend Sam had three sons. Sentence 2: The youngest was born with a heart defect. Sentence 3: His heart was enlarged and he could die at any time. Sentence 4: His son got better and is now 16. Sentence 5: Sam is very grateful. Choices: a. Enlarged Heart. b. Hiking.

a