What did Pharaoh's magicians do after Aaron caused frogs to covered the land of Egypt?

TRIV What did Pharaoh's magicians do after Aaron caused frogs to covered the land of Egypt?

For I will pass through the land of Egypt this night, and will smite all the firstborn in the land of Egypt, both man and beast. Exodus 12:12

And the magicians did so with their enchantments, and brought up frogs upon the land of Egypt. Exodus 8:7

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