Library Book Sorting

You are designing a library system where books need to be sorted for a catalog. Each book has a title and an author. You need to sort the books first by author name (ascending) and then by book title (ascending) if the author names are the same. Your program should read a list of books and their authors, and output the sorted list of book titles. Input: The first line contains an integer N (1 <= N <= 1000), the number of books. The next N lines each contain a book title (a string) and an author name (a string). Output: Print the sorted list of book titles, one per line. Example: Input: 3 WarAndPeace LeoTolstoy 1984 GeorgeOrwell AnimalFarm GeorgeOrwell Output: 1984 AnimalFarm WarAndPeace