The shape of Latin S occurs from Greek Σ by dropping a single out on the 4 strokes of that letter. The (angular) S-form made up of 3 strokes existed being a variant with the 4-stroke letter Σ by now in the epigraphy of Western Greek alphabets, and also the https://damiennpkgy.isblog.net/the-2-minute-rule-for-bud-naked-concentrate-48581632