Mix of digits, uppercase and a specific letter rule - help

[xkwas]

Hi there!
I want to create a rule file using mask processor (and no other dictionary involved, if possible) straight to a .hccapx handshake file I have already obtained. 
The rulefile should look like this
Digit Uppercase Uppercase Digit Digit Digit W Uppercase Digit Digit Digit Digit Digit
e.g:
0AA000WA00000
Please note there is a W, which appears to be the seventh symbol.
Any ideas?
Thanks!