The shape of Latin S arises from Greek Σ by dropping 1 out of the four strokes of that letter. The (angular) S-form composed of three strokes existed for a variant of your 4-stroke letter Σ currently during the epigraphy of Western Greek alphabets, and also the 3 and 4 https://beaudtjzo.daneblogger.com/30672591/facts-about-bud-naked-mushrooms-revealed