+--+----+-----+ +----+
| | C | | --> | A1 |
+--+----+-----+ +----+
+---+---+ +----+
| D | | --> | A2 |
+---+---+ +----+
+--+----+ +----+
| | E | --> | A3 |
+--+----+ +----+
+---+ +----+
| F | --> | A4 |
+---+ +----+
+---+ +----+
| G | --> | A5 |
+---+ +----+
+--+---+ +----+
| | H | --> | A6 |
+--+---+ +----+