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: One Christmas morning john woke up to barking. Sentence 2: He thought this was odd because they didn't have a dog. Sentence 3: He ran down stairs to the tree where all the presents were. Sentence 4: He opened the biggest one and out popped a puppy. Sentence 5: He named the puppy bear.

Bear