A scroll is a roll of paper, parchment, or papyrus that can be unwound for writing upon or reading. A popular format for recording texts prior to the development of codices, scrolls fell out of common use by the Middle Ages. However, some Hebrew scribes still copy scrolls of the Torah by hand, adhering to extremely strict guidelines used since antiquity. If a copy differs from the original by a single letter, the entire scroll can be invalidated. How many letters are contained in a Torah scroll? Discuss