+------+
          |  E   |
          +------+
            ^
            |
            |
          +------+
          | High |
          +------+
            |
            |
            v
          +------+
          |  D   |
          +------+
+---+     +------+     +---+
| C | <-- | Wide | --> | B |
+---+     +------+     +---+