geometries

  _____        _____        _____
 /     \      /     \      /     \
<       >----<       >----<       >
 \_____/      \_____/      \_____/
 /     \      /     \      /     \
<       >----<       >----<       >----.
 \_____/      \_____/      \_____/      \
       \      /     \      /     \      /
        >----<       >----<       >----<
       /      \_____/      \_____/      \_____
       \      /     \      /     \      /     \
        `----<       >----<       >----<       >
              \_____/      \_____/      \_____/
                           /     \      /
                          <       >----'
                           \_____/