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Merge arrays and preserve positions

Given $ n $ lists of numbers:

$$ [A_1, A_2, ..., A_x ] $$
$$ [B_1, B_2, ..., B_y ] $$
$$ [C_1, C_2, ..., C_z ] $$

Join them in a way that the index of each element is preserved. The order between elements with the same index does not matter.

Sorted:
$$ [A_1, B_1, C_1, ..., A_x, B_y, C_z] $$
Arbitrary, but still correct as the rough order is preserved:
$$ [A_1, C_1, B_1, C_2, A_2, B_2 ..., B_y, A_x, C_z] $$

If the arrays are of different lengths, extra elements are not inserted, they are merged as-is:
$$ [A_1, A_2, A_3, A_4, A_5] $$
$$ [B_1, B_2, B_3] $$
becomes:
$$ [A_1, B_1, A_2, B_2, A_3, B_3, A_4, A_5] $$

# Examples
These examples assume ordering remains correct. 
```
[1, 2, 3], [4, 5, 6] -> [1, 4, 2, 5, 3, 6]
[1, 2], [3, 4], [5, 6], [7, 8] -> [1, 3, 5, 7, 2, 4, 6, 8]
[1, 2, 3], [4, 5], [6] -> [1, 4, 6, 2, 5, 3]
```