+-------------+ +-------------+ +-------------+
           |             | |             | |             |
           |             | |             | |             |
           |             | |             | |             |
           | +-+ +-+ +-+ | | +-+ +-+ +-+ | | +-+ +-+ +-+ |
           | +-+ +-+ +-+ | | +-+ +-+ +-+ | | +-+ +-+ +-+ |
           +-------------+ +-------------+ +-------------+