Hi,
Because next bigger int for (1234567890) inserted is (1234567908), but not (1234567980) =)
You need to re-check your algorithm or code

IPs should be considered valid if they consist of four octets, with values between 0 and 255, inclusive.

Why would it be valid?

Could someone explain this please?

are you sure you're not comparing your output with the expected output?

hi,

Considering the number of completinos in JS, there are close to no chances that the tests are incorrect. Keep in mind you didn't provide the input, so there is nothing to tell, right now. What if the input was 1234567890? Then your code is giving the wrong answer, that's all.

and it won't be one of the other given digits in the expression.

Asked and answered many times before.