The constraints need some tweaking. For example, it should be possible to repeat a note by repeating a keypress. The input could be interpreted more strictly as

The constraints need some tweaking. For example, it should be possible to repeat a note by repeating a keypress. The input could be interpreted more strictly as a Parsons Code [1]. [1] https://en.wikipedia.org/wiki/Parsons_code https://en.wikipedia.org/wiki/Parsons_code