Events: Player 1 (red) types -kick blue as an exact math
Conditions: (None)
Actions: If/Then/Else: If: Name of Player 2 (Blue) equal to Rui Then: Skip Remaining Actions Else: Defeat Player 2 (Blue) with the Message You have been kicked" (or something like that)
That's it. It's perfect lol. You can also use svoluch isntead of Rui. XD.