fn main() {
	mut a := [1, 2]
	a.insert(1, 2.3)
	a.insert(1, 'abc')
	a.insert(1, [1.1, 2.2])
	a.insert(1, ['aa', 'bb', 'cc'])
	a.insert(1, [[1]])
	a.insert(1, [[['aa']]])
	println(a)

	mut b := [[1, 2, 3]]
	b.insert(0, [[[2]]])
	b.insert(0, [[[['aa']]]])
	println(b)
}