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: Natasha was born on Christmas day. Sentence 2: She didn't like it because all her gifts were mixed together. Sentence 3: To help her, her mother changed her birthday's date. Sentence 4: She celebrated her on June the 25th of each year. Sentence 5: So that way Natasha had two sets of presents and was happier.

Christmas or birthday?