Natural Sort

I
```from __future__ import annotations

import re

def natural_sort(input_list: list[str]) -> list[str]:
"""
Sort the given list of strings in the way that humans expect.

The normal Python sort algorithm sorts lexicographically,
so you might not get the results that you expect...

>>> example1 = ['2 ft 7 in', '1 ft 5 in', '10 ft 2 in', '2 ft 11 in', '7 ft 6 in']
>>> sorted(example1)
['1 ft 5 in', '10 ft 2 in', '2 ft 11 in', '2 ft 7 in', '7 ft 6 in']
>>> # The natural sort algorithm sort based on meaning and not computer code point.
>>> natural_sort(example1)
['1 ft 5 in', '2 ft 7 in', '2 ft 11 in', '7 ft 6 in', '10 ft 2 in']

>>> example2 = ['Elm11', 'Elm12', 'Elm2', 'elm0', 'elm1', 'elm10', 'elm13', 'elm9']
>>> sorted(example2)
['Elm11', 'Elm12', 'Elm2', 'elm0', 'elm1', 'elm10', 'elm13', 'elm9']
>>> natural_sort(example2)
['elm0', 'elm1', 'Elm2', 'elm9', 'elm10', 'Elm11', 'Elm12', 'elm13']
"""

def alphanum_key(key):
return [int(s) if s.isdigit() else s.lower() for s in re.split("([0-9]+)", key)]

return sorted(input_list, key=alphanum_key)

if __name__ == "__main__":
import doctest

doctest.testmod()
```