In Acts 19, what did the evil spirit say to the vagabond Jewish exorcists?

I know Jesus and Paul, but who are you?

Then certain of the vagabond Jews, exorcists, took upon them to call over them which had evil spirits the name of the LORD Jesus, saying, We adjure you by Jesus whom Paul preacheth. ...

And the evil spirit answered and said, Jesus I know, and Paul I know; but who are ye? Acts 19:13-15