key down: 17, 
text input: text, 
changed: x
key up: 17, x
key down: 89, x
text input: y, x
changed: x
key up: 89, x
key down: 88, x
text input: x, x
changed: xx
key up: 88, xx
key down: 16, xx
key down: 88, xx
text input: X, xx
changed: xxx
key up: 88, xxx
key up: 16, xxx
key down: 17, xxx
text input: xxxxx, xxx
changed: xxxxx
key up: 17, xxxxx
