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: Larry went on a camping trip with his younger brother. Sentence 2: During an evening hike, they got separated. Sentence 3: Larry called out his brother's name, but there was no answer. Sentence 4: As night fell, Larry began to get worried. Sentence 5: Larry returned to the campsite, where his brother was waiting for him. Choices: a. Lost Boy. b. Buying a new suit.

a