How to find the last n characters of a password

[lalalalala12345]

Command:
hashcat -m 100 YourHash -a 3 FIRST7C?a?a?a?a?a
Just replace "YourHash" of course with your hash and "FIRST7C" with the first 7 known characters. Hashcat should output "Status.....: Cracked" if it cracked your password and show your hash and the hash:plaintext above that

Thanks