The form of Latin S occurs from Greek Σ by dropping one out in the four strokes of that letter. The (angular) S-shape composed of three strokes existed as a variant from the four-stroke letter Σ presently during the epigraphy of Western Greek alphabets, and also the three and 4 https://rylantwmds.blogoscience.com/37458398/a-review-of-bud-naked-mushrooms