Switch next character

I have 5 characters in character set with key combinations CTRL+ALT+1, ... CTRL+ALT+5 to switch.
How to switch characters 1>2>3>4>5>1 etc with one key?
How to switch characters 1>2>3>4>5>1 etc with one key?
BotFighter wrote:I saw it, that's only change focus and not swap region in window layout.