T318357 ez problem

This is an ez problem.

On Apr 1st we celebrated the birth of Luogu Intl, and Alice wanted to try it. But there are numerous problems in the main problem set and Alice is eager to find ez problems. So she decided to ask u whether a problem is ez or not.

The input contains multiple test cases. Each line of the input contains one integer $x$, which is the PID of the problem Alice asks u.

For every test case, your output should contain only one line. If the problem Alice asked u is ez, output `ez`. Otherwise, output `not ez`.

$1000 \leq x \leq 9202$ The number of test cases does not exceed $10000$.