-include "ground_2/xoa/ex_2_3.ma".
-include "ground_2/xoa/ex_3_2.ma".
-include "ground_2/xoa/ex_3_3.ma".
-include "ground_2/xoa/ex_3_4.ma".
+include "ground/xoa/ex_2_3.ma".
+include "ground/xoa/ex_3_2.ma".
+include "ground/xoa/ex_3_3.ma".
+include "ground/xoa/ex_3_4.ma".