Syntax help

[dewslat]

Hi guys.. I am trying to brute force crack a WPA password.. but i am having difficulty with some syntax
The combination of the password is

WIFIpass_XXXXX 
X is charset abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789


is this possible?

[kamsulla]

pls read, https://hashcat.net/forum/thread-6170.html

[undeath]

https://hashcat.net/wiki/doku.php?id=mask_attack