Please read this: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution

https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution#print-input

I have only one error from 24 passed tests. How could i know that testing array witch i have mistake ?

• Check which tests causes your solution to fail, see here how: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution#how-can-i-see-which-input-causes-my-solution-to-fail . Tests are "hidden" in a way you cannot see the test suite, but you can see the input which your solution cannot pass.
• Recreate the test case locally in your IDE.
• Debug through it, find the error, and fix it :)

I passed all of the tests I could see/think of... when I hit attempt it is failing the hidden tests. Not sure how your suggestion is helpful for that

Print the input, see which ones your code is failing and fix it.