For example, the letter H is composed of 2 long vertical lines and a short horizontal line; but if we rotate the H 90 degrees in either direction, it is now composed of 2 long horizontal lines and a short vertical line.
Take the letter H as an illustration. It is formed from two long vertical strokes and one short horizontal stroke. Nonetheless, when this letter is rotated 90 degrees in any direction, it transforms into two long horizontal strokes and a single short vertical stroke.