[(0, 1, 2), (3, 4, 5), (6, 7, 8)]
[("A", "B", "C"), ("D", "E", "F"), ("G", "H", "I")]
[((1, 2), (3, 4), (5, 6)), ((7, 8), (9, 10), (11, 12))]
[(), (), ()]