How to input ? charactor?

[M@LIK]

-1=?$er

http://www.robvanderwoude.com/escapechars.php

What part of that charset you think needs to escaped on Windows' cmd, sir? Or is it pick-on-windows-noobs day?

The problem is: 1) No "=" between "-1" and the charset (unless you want to include it in the charset).
2) "?" needs to be escaped ("??") due to -plus' handling of masks.