Implement a string sorting algorithm, treating digits as numbers.

To implement a string sorting algorithm that treats digits as numbers (natural sorting), you can use Python's sorted() function with a custom key. This key function should parse the string, separating it into alternating text and numeric chunks. For each chunk, if it's a digit, convert it to an integer; otherwise, convert it to lowercase for case-insensitive comparison. The re.split(r'(\\d+)', s) function is effective for splitting the string while keeping the delimiters (the numbers). The sorted() function then uses these parsed lists to compare strings naturally, ensuring that 'item2' comes before 'item10'.