mask brute force

[julianhey]

Hello, 

I want to know what is the instance on Amazon aws for crack the wpa2 key 22000 ? 
i want to test this one  : hashcat.exe -m 22000 -a 3  handshake.hc22000 a?a?a?a?a?a?a?a?
or the command for only a-z and 0-9. How long it takes ? thanks.