Book Sorting for Library

A library needs to organize its books based on the author's last name and then by the book title. You will receive multiple lines of input with each line containing the author's name followed by the book title, separated by a dash. Your objective is to sort the books first by the author's last name and then by the book title. The output should be the sorted list in the same format. Example: Input: Harper Lee - To Kill a Mockingbird George Orwell - 1984 Harper Lee - Go Set a Watchman Output: George Orwell - 1984 Harper Lee - Go Set a Watchman Harper Lee - To Kill a Mockingbird