Attack 10 char password known to start with 3 digits

I'm trying to figure out a mask attack to use with hashcat where the hash is of a password known to be 10 characters long, of a-zA-Z0-9, beginning with 3 digits.

I've looked at the mask attack page, but I can't seem to figure it out.

Maybe it's
-1 ?d?d?d -2 ?l?u?d ?1?1?1?2?2?2?2?2?2?2

It appears correct to me, but I'm not sure yet.

you were very close, you don't need to define the -1.

-2 ?l?u?d ?d?d?d?2?2?2?2?2?2?2