Can I configure HC with known chars in a password?

[philsmd]

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

hashcat -m 2500 -a 3 -2 ABC -3 ?l?u?d hash.txt D?2?3?3?3?3?3?3

-1, -2, -3, -4 are the custom charsets (--custom-charset1 ... --custom-charset4)

-2 ABC means "A" or "B" or "C"
-3 ?l?u?d means either lowercase char or uppercase char or digits

D?2?3?3?3?3?3?3 means "D" is hard-coded, 2nd position is set of chars from --custom-charset2 (or short -2),
after 2nd position (3rd to 8th) is using charset from ?l?u?d