(let (a [10 20 30 40 50])
	(delete! a 0)
	(say a))

(let (a [10 20 30 40 50])
	(delete! a 3)
	(say a))

(let (a [10 20 30 40 50])
	(delete! a 4)
	(say a))

(let (a [10 20 30 40 50])
	(delete! a 5)
	(say a))