It is a number that is neither positive or negitive. Hope that helps

I see that there has been a minor bug logged. Is there a place where I can see what the minor bug is?

Run this test case through your code.

Test.assertEquals(tongues('Tywpadh (1234567890) etr bytlnyenoit, nsau hsiycr pins pa ytlsetfar!'), 'Numbers (1234567890) and punctuation, they should both be unchanged!');

I hope this puts you in the right direction.

I add it because it adds a simple layer of string manipulation to the problem.

Thanks for the catch. That has been updated.

Updated the test fixtures to have === in them. Are there any other issues with this one that you guys have found??

Sorry guys for the typo the Evil wizards should be worth 10. I also updated the output section to use return instead of print.