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: Diana loved her trading cards. Sentence 2: She spent all of her money collecting more cards. Sentence 3: One day, Diana met Tamora, who also enjoyed trading cards. Sentence 4: Before, Diana thought she was the only girl who liked them. Sentence 5: They soon became best friends.

Trading Cards