Hi, I solved it but my question is why: P(8, 2) = 5/36 counts five ({4,4}, {3,5}, {5,3}, {2,6}, {6,2}) and not 6 that is {4,4} should be 2 times like {3,5} and {5,3}.
So the output should be 6/36. It's only my opinion.

Had to hardcoded one of the basic test and also had to run test couple of times to pass all of them. Probaly problem with floating digits. Wasted time for this nonesens and this Kata.
And the description killed me: "Tortoises don't care about fractions of seconds" Heh BUT PYTHON DOES!!!!