how to use just lower case alpha numeric only?

[yugiohle]

alot of it I just randomly guessed. could you please tell me what -1 ?l?d stands for?  i know ?l?d is for lower case and digits so what is -1 infront of that, and also if I already got ?l?d why does it need the last part ?1?1?1?1?1?.

what is ?1

-1 ?l?d just defines the custom character class "?1" as being "?l?d", so you can use custom charsets as well as the built in ?a ("all") ?s (special) ?d (digit) ?l (lower) ?b (byte)

You can define up to 4; ?1, ?2 ?3 and ?4, which allows for more complex things like -1 ?u?l?d -2 ?l?d -3 ?d?s  ?1?2?2?2?2?3

(The syntax is a bit of a shock at first, but you get used to it.)

The last part is the actual mask/transcript of the password. @blacktraffic I guess explained the rest. Also, be sure to https://hashcat.net/wiki/doku.php?id=mask_attack as it should contain answer to most of your questions regarding mask attacks

ah I see I think I got it now. thank you!