It just means the code failed a test. Presumably it was one of the random tests, if it's already passed the fixed example tests. Unfortunately this kata doesn't give feedback on what the result should have been, but you can probably see that for yourself if you make your code print out the string it was given and the number it intends to return.

Why didn't you mark your question as resolved, then? It's a good thing to clean up things left behind.

Same here. Got exactly the same outputs but can't pass random tests

You'll need to provide more info than that... Language? Which input fails? Try reading this first