12 exercises are the foundation of 30 sets of exercises. In each set 12 exercises are different.
They practice on the third stage of Kouk Sun Do's practice (which calls "Won Ki Dan Boub"), after passing of the first stage (Jung Ki Dan Boub, it includes two substages, each one consists 25 postures) and second stage (Keon Kon Dan Boub, 23 postures) of Kouk Sun Do.
In Kouk Sun Do everything is consistent.