	0	0	1	null
	10	1	0	z := zscan()
You entered: 123
	20	2	0	print("You entered: ",z)
	30	1	0	z := zscan()
You entered: 456
	40	2	0	print("You entered: ",z)
event queue:
check queue:
	time	eid	pid	event
	50	1	0	z := zscan()
