The form of Latin S occurs from Greek Σ by dropping 1 out on the four strokes of that letter. The (angular) S-form composed of three strokes existed like a variant on the four-stroke letter Σ previously during the epigraphy of Western Greek alphabets, and also the three and 4 https://arthurumcro.blogoscience.com/37454038/what-does-bud-naked-concentrate-mean