The letters S and N have point symmetry but not line symmetry.
x
Z S H and N
The list provided with the question doesn't include any letters that meet the requirements.
Letters that have a vertical line symmetry: WTYUIOAHXVM Letters that have a horizontal Line symmetry: EIODHKCB
It is the same as in shapes, the ability to be divided into two equal halves either vertically or horizontally. Not all letters have a line of symmetry, and some have two (H, X, O).
A, B, C, D, E, H, I, K, M, O, T, U, V, W, X, and Y all have point symmetry
Lower case "o" and "x" both have two lines of symmetry. Upper case letters with two lines of symmetry are: "O," "X," "H" and "I."
Line symmetry = Reflection symmetry. Point symmetry = Rotational symmetry.
H,I,O,X,
by divide in two halves equal
Icebox, decided