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: Walter had always wanted a pet ever since he was 7. Sentence 2: If his mom wasn't allergic to pet hair, he could have gotten a dog. Sentence 3: After Walter grew up, he moved to another city. Sentence 4: Walter was able to pick a very big dog from the shelter. Sentence 5: Now Walter has 3 dogs and he is very satisfied.

Dog