include "ground_2/notation/xoa/true_0.ma".
include "ground_2/notation/xoa/or_2.ma".
include "ground_2/notation/xoa/and_2.ma".
include "ground_2/notation/xoa/true_0.ma".
include "ground_2/notation/xoa/or_2.ma".
include "ground_2/notation/xoa/and_2.ma".