How can I capture groups ?

[prehonor]

This is my
(defun testreg (trojan)
(ppcre:register-groups-bind (first second third fouth fifth sixth seventh eighth ninth tenth eleventh twelfth) ("^(?:(1)|(2)|(3)|(4)|(5)|(6)|(7)|(8)|(9)|(a)|(b)|(c))+$" trojan)
(remove nil (list first second third fouth fifth sixth seventh eighth ninth tenth eleventh twelfth))))
(help-trojan-tolist "123456789ab")

but, I must define 12 parameters, is there other way that I use one parameter of list type to take 12 groups?