Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Little Billy hated wearing his bike helmet. Sentence 2: It made his head look bigger than it was. Sentence 3: All the cool kids at school rode around without a helmet. Sentence 4: One day Bill crashed his bike, while wearing his big helmet. Sentence 5: He realized it was better to have a big helmet than none at all.

Helmet