humre.parse() not returning a Humre string

[clsmith70]

I am running Linux Mint 22.3 with the built-in Python3.12 and Python3.14. I tried the example from "Automate the Boring Stuff with Python" but do not receive the output expected. The parse function is just returning None.

Python 3.14.3 (main, Feb  4 2026, 09:28:29) [GCC 13.3.0] on linux
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>>> import humre
>>> humre.parse(r'\d{3}-\d{3}-\d{4}')
>>> 

I have installed it in virtual environments under both versions of Python and get the same response.