Break down some of the walls below so that what is left are six regions separated by the remaining walls, each of which contains exactly one each of the letters A through F.

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| E | A | F | B | E | F |
+---+---+---+---+---+---+
| C | F | C | E | D | C |
+---+---+---+---+---+---+
| A | A | D | B | D | E |
+---+---+---+---+---+---+
| F | B | A | D | B | C |
+---+---+---+---+---+---+
| E | D | C | B | A | E |
+---+---+---+---+---+---+
| C | B | F | D | F | A |
+---+---+---+---+---+---+