The main idea with the challenge-response type of authentication protocol is that the challenge sent by the server is used only once (referred to as a cryptographic nonce, which means “number used once”).

The Upland Cinema (The Flea Pit) stood on the corner of The Grove, the street where he had been born.

“Give it commands,” Mike concluded, “with the formula 'Horse and Hattock,' and activate it by saying three times: Horse and Hattock, horse and go, Horse and Pellattis, ho, ho!”

This fell whore of thine, / Hath in her more deſtruction then thy Sword, / For all her Cherubin looke.