Mask understanding help needed

[siteregistrator]

I think that in this case, the space should have not been there.  It's a simple bruteforce of 5 characters to generate candidates to process afterward so you should have read ?1?1?1?1?1.   Yes, -1 ?l?d?s?u sets the charset but now you can more simply use ?a?a?a?a?a instead.

Thank you a lot