keku

“It is a drawing of the letter S" said the deep, solemn voice from over her shoulder, and she realized she had stopped midstride. "The letter in question is constructed from six short marks stacked vertically three by three. There are two triangles on the top and bottom. which, along with some diagonal strokes, form a calligraphic S.”
― Tamsyn Muir, Harrow the Ninth