Rules are simple. There is a test which tests function. Function has to add two numbers and return result. Make test pass. But make it pass in most obscure, crazy and creative way you can.
Clone repository.
Make virtualenv python3 -m venv ~/adding_frenzy, and activate it.
Install requirements pip install -r requirements.txt.
Just make test.
I've just used something that is called visual spoofing. This is a method that uses different combinations of unicode characters to get a similiar output for example:
U+006F U+0336 U+0335 o̶̵
U+006F U+0335 U+0336 o̵̶
more about this is available via this link: http://websec.github.io/unicode-security-guide/visual-spoofing/