Per the docs:
Under natural sorting, strings are splitted at word and number boundaries, and the resulting substrings are compared as follows:

* numeric substrings are compared numerically
* alphabetic substrings are compared lexically
* numeric substrings come always before alphabetic substrings

In reply to Re^3: sorting by numbers then alphabetically by eff_i_g
in thread sorting by numbers then alphabetically by Anonymous Monk

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