I think its probably numbers like 999, 999_999, etc. theyre monotone and output should be "2"
but at the same time theyre 1 mile away from being a big number so output could either be "1".

In my solution I got failed test whenever I prioritise "yes" or "almost" output (1 or 2). When I prioritise "1" - error told me the output should be "2" and vice versa.

upd: my bad, its not 999 and 99999 etc. numbers problem. Its solvable in Java if you pay close attention to task description :-)