After Moses turned turned his rod into a serpent, what did Pharaoh's magicians do?

They did likewise

(But Aaron's rod swallowed theirs.)
Aaron cast down his rod before Pharaoh, and before his servants, and it became a serpent.

Then Pharaoh also called the wise men and the sorcerers: now the magicians of Egypt, they also did in like manner with their enchantments.

For they cast down every man his rod, and they became serpents: but Aaron's rod swallowed up their rods. Exodus 7:10-12