I don't know if they're accurate, but there is Tap code for this exact reason.[0] Not that I have known this before, but people talk about it in TFAs comments

I don't know if they're accurate, but there is Tap code for this exact reason.[0] Not that I have known this before, but people talk about it in TFAs comments as 5x5. [0] https://en.wikipedia.org/wiki/Tap_code https://en.wikipedia.org/wiki/Tap_code