⍳[3,3,3]
>>>
[[[[0,0,0],
[0,0,1],
[0,0,2]],
[[0,1,0],
[0,1,1],
[0,1,2]],
[[0,2,0],
[0,2,1],
[0,2,2]]],
[[[1,0,0],
[1,0,1],
[1,0,2]],
[[1,1,0],
[1,1,1],
[1,1,2]],
[[1,2,0],
[1,2,1],
[1,2,2]]],
[[[2,0,0],
[2,0,1],
[2,0,2]],
[[2,1,0],
[2,1,1],
[2,1,2]],
[[2,2,0],
[2,2,1],
[2,2,2]]]]