[3, 2, 1, 0, -1, -2, -3]
[1, 0, -1], (0,1)^2
[2, 1, 0, -1, -2], (1,2), (-1,2)
[1, 0, -1], (0,1)^3
[2, 1, 0, -1, -2], (1,2), (0,2), (-1,2)
[1, 0, -1], (1,1), (0,1)^2, (-1,1)
[0], (1,0), (0,0)^3, (-1,0)