Common Favorite Products

You are designing a system for an e-commerce platform that allows users to save their favorite products. Given two lists of products from two different users, your task is to find and return the common favorite products between both users. Input Format: - The first line contains an integer A, the number of products for User A. - The second line contains integer B, the number of products for User B. - The next A lines contain the product IDs of User A. - The following B lines contain the product IDs of User B. Output Format: - Print each common favorite product ID, one per line, in sorted order. Example Input: 5 4 P1 P2 P3 P4 P5 P3 P4 P6 P7 Example Output: P3 P4