What's on the Rosetta Stone?

The Rosetta Stone took 50 years of decoding just to get back to something even with parallel scripts. People always get a very offended to learn that we have collected you know two or three thousand versions of the story of Genesis as the parallel text. But when they get offended I asked them what was on the Rosetta Stone and they don't know. You guys can answer boring tax law. It's a boring stone.