ok thanks all, I will move global variables inside the function, thanks.

I am not sure if there's a misunderstanding.
When I click the ATTEMPT button, on the left hand panel, the system runs a test and the array of numbers above is from that test.
I'm just trying to let Kata know their testing has an error. But I don't know how to report it, if you know how to report the error, please advise, thanks.

there's a mistake in the Kata test because the order of array items should be preserved, instead, the Kata's test below changes the order.

expected '[1,2,1,1,3,1,9,9,1,2,1,1,3,1,9,9,0,0,0,0,0,0,0,0,0,0,0,0,0,0]' to equal '[9,9,1,2,1,1,3,1,9,9,0,0,0,0,0,0,0,0,0,0]'