What are the symmetrical English letters?

Here are the symmetrical English letters, along with the type of symmetry they exhibit:

Vertical Symmetry:

* A

* H

* I

* M

* O

* T

* U

* V

* W

* X

* Y

Horizontal Symmetry:

* B

* C

* D

* E

* H

* I

* K

* O

* X

Both Vertical and Horizontal Symmetry:

* H

* I

* O

* X

None:

* F

* G

* J

* L

* N

* P

* Q

* R

* S

* Z