Custom Object Sorting

Given a list of objects representing books, sort them by publication year ascending. If two books were published in the same year, sort them by title in ascending order. Each book has a title (a string) and a publication year (an integer). Your input will consist of multiple lines, where each line contains a title followed by a year, separated by a comma. Output the sorted list of books, one per line in the same format. Example Input: 'War and Peace,1869' 'Dune,1965' 'The Great Gatsby,1925' 'To Kill a Mockingbird,1960' '1984,1949' Example Output: 'War and Peace,1869' 'The Great Gatsby,1925' '1984,1949' 'To Kill a Mockingbird,1960' 'Dune,1965'