Respuesta :

AL2006
E has 3 of them.
F has 2 of them.
H has 2 of them.
M has 2 of them on the sides.
N has 2 of them on the sides.
U has 2 of them on the sides.
W has 2 PAIRS of them ...  the  \ \  and the  / /
Z has 2 of them on the top and bottom.